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Evan says his girlfriend's sister made up the story that they had sex; Sarra's much-older husband accuses her of having sex with her own cousin.
Gloria thinks her sister's apparent drug-overdose death was not an accident, and that her other sister may be responsible.
Nicole thinks Sean openly cheats on her, but she's the one who gets the positive test result; Imani sports the promise ring from Charles, but she may have to return it after contracting a sexually transmitted disease.
After spending years in prison for a crime he says he did not commit, Sontay accuses his ex-girlfriend's family of setting him up.
Donnie's wife disappeared with his cousin for hours and refused to take his phone calls; another parent told Angelina that her boyfriend was cheating with a prostitute.
Steve looks back on memorable stories of DNA clearing up years of doubt and mystery or devastating and confirming people's worst fears.
A look at guests who are subjected to emotional abuse that chips away at their self-worth and independence.
Adrian thinks Shantay has been lying throughout their relationship; Uniqua and her husband fear that he is not the father of her child; Chris' girlfriend wants him to know that one of their five children is not his.
Before Tonesha marries Theotis, she wants to know if he has cheated on her; Danielle suspects her partner, Shaun, is cheating and lying about being at work; less than a day after their wedding, Shante discovered that David sent naked photos to women.
Victoria says Dewayne harasses her, calls her horrible names and is physically abusive toward her; wedding plans are on hold until Trenell can pass a lie detector test.
Sex addict Princess wants to confess to her fiancé about her secret double life.
Chris fears that his girlfriend is still sleeping with her abusive ex; Quay thinks constant arguments over cheating caused her to miscarry her twins; Raena says her man accuses her of cheating with every man she happens to be around.
Alfred thinks his partner is living a secret life; Demetrius says his wife is having an affair and gave him an STD; Latavia's ex-boyfriend takes a lie-detector test to try to win her back.
Melody says her boyfriend gave her an STD from another woman; Ted is so suspicious, he sends the children to spy on his wife when she goes to the store.
Jatavious wants to know if he is the father of his girlfriend's children; Freddie suspects that one or both of his girlfriend's newborn twins may not be his.
Newlywed Jennifer says she has caught her husband searching for teen porn daily and has been told that he sneaks underage girls into their house when she is not at home; Amanda has heard rumors that her husband is a child molester and peeping Tom.
Loretta says her boyfriend punched her and pulled her hair while she was pregnant; he accuses her of cheating and being a prostitute.
Tyjuan says he feels justified in beating up his girlfriend because he thinks she is cheating, and he doubts the paternity of their five children; Natasha fears that her rapist, not her husband, may be her baby girl's father.
Within days of becoming a live-in nanny, 17-year-old Cassarah began a sexual relationship with her 43-year-old employer.
A year ago, Jessica confessed to violently shaking her infant and causing him severe brain injuries, but now she says she never hurt him and the injuries were caused by a sippy cup.
A woman accuses her boyfriend's wife of stalking her and causing her physical harm.
A cancer patient and his mother claim they never got the money that was raised for medical expenses.
Jackie and her children live with a registered sex offender; accused of molesting his own son, Ronnie takes a lie-detector test and demands a DNA test too.
Valerie says her boyfriend treats her like she is in prison; Amanda's abusive boyfriend denies being the father of her children.
A man wants a DNA test when he discovers an ex has a baby and says he is the father; days before a couple's anniversary, the husband is accused of cheating on his wife.
Hannah's boyfriend hacks into her computer and texts her friends, pretending to be her; Nicole says fighting with her husband caused her to have a miscarriage, but he says she may have faked her pregnancy.
Bobby and Amber lost custody of their children due to neglect and accusations of abuse; Kyle says his mother-in-law is coaching his children to say he molested them.
Teen Heather says her boyfriend is the father of her child, but he says his brother is; a family fight over who beat a 2-year-old goes online.
Kelsey hopes DNA and lie-detector tests will stop her husband from abusing her; Chris denies his girlfriend's newborn; after a one-night stand, Lynnette is unsure who is her baby's father.
Anthony believes his ex and her new boyfriend are abusing his son; Tracey says she has proof her niece abuses and neglects her two young children, but her niece says she is just making it all up.
Danielle, whose six children were taken out of her care, wants to prove she is a good mother and have another baby.
Jamarkus says he fears that his twins are not his own; a teen and his mother insist that he is not the father of his ex-girlfriend's baby; Leroy says there is no way his daughter's mother's son is his.
Stephanie takes a lie-detector test to prove that she is faithful to her boyfriend; an engaged couple accuse each other of cheating; Maurice wants to prove to his girlfriend that he is loyal.
Rachel wants to know whether her boyfriend is too good to be true; Letisse says her cab-driving boyfriend drove another woman around town for 10 hours.
A woman is torn between believing her boyfriend and her best friend, who says the boyfriend is gay; a guest fears that her child's father is cheating on her with other men.
A video posted online shows a woman blowing marijuana smoke in her baby's face; a 10-year-old smokes and wanders the streets.
A man says his baby's mother's new boyfriend is abusing the child.
A teen's sister tries to get her to stop prostituting herself; a teen wants her baby's daddy to take responsibility; a woman tries to stop her teenager from sending sexual pictures of herself to men.
Lie-detector tests gauge whether guests are abusing children.
Men accused of cheating take tests to prove their fidelity to their partners.
Steve confronts people accused of abusing children and makes them face the truth of their lie-detector results.
A man wants to know whether his fiancée is cheating on him and whether she ever prostituted herself; a pair returns for a DNA test.
Guests learn the results of paternity tests.
A man confesses to cheating with his girlfriend's sister-in-law but says it was the sister-in-law that seduced him.
A 13-year-old girl smokes marijuana, has sex and cuts herself.
The futures of families depend on the results of paternity tests.
A woman accuses her daughter of neglecting her children; a man accuses his ex-wife's boyfriend of abusing his young daughters.
A woman believes that her son's ex-girlfriend and her new boyfriend are abusing her granddaughter and failing to provide her with medical care.
A man makes a shocking confession to his longtime girlfriend; a woman wants to know if her man is cheating on her with his ex-girlfriend, who lives with them.
A woman says her stepfather sexually abused her as a child.
Steve tries to get through to an aspiring gang member about the dangers of the lifestyle.
A woman accuses her ex-husband and his new wife of molesting her daughter.
A daughter tells her drug-addict mom she no longer wants a relationship with her.
An abusive mom wants to be back in her child's life; Steve tries to help bring a rapist to justice.
A 22-year-old woman accuses her mother of allowing her to be raped when she was a child.
A 13-year-old boy physically and emotionally abuses his sister and his cancer-ridden mother.
A man wants to find out the truth about the death of his 4-month-old daughter.
After receiving a heartfelt plea from a daughter begging to get her mom off drugs, Steve travels to a small town in Ohio.
Steve confronts a man who admits he abuses his fiancée and sees nothing wrong with it.
A runaway teen lives with her older boyfriend, who does not allow her to leave the house.