Tyler Baltierra: I Was Sexually Abused PLUS 9 Other Shocking Sex Secrets From The Latest 'Teen Mom' Tell-All

As a 9 year old, Baltierra says he was molested by a friend of his older sister. "One day I went over to her house with my sister and some other people, and for some reason or another, everyone else left but this older girl and me," he recalls in the book, out March 3. "For the next several hours, it was sex act after sex act after sex act. It went on all day. She had us going everything she could think of, one thing after another." He says he felt confused: "I didn't know what the hell had happened."

Baltierra says he was deeply affected by the scary events that took place that day. "It made me think sex was something kids could do, which influenced me to act too sexual when I was too young." He admits he broke up with his elementary school girlfriends because they were "prudes." "We were 10-year-olds!" he writes. "It's so messed up."

Before he met Lowell in 7th grade, he was already sexually active. "I wound up finding a girlfriend who wanted to do it all the time," Baltierra says. "She was crazy, and that was basically all we did."

Though they would go on to have a long-lasting love affair, Baltierra had only one thing in mind when he met Lowell for the very first time at age 12. "She's got bigger tits than any other girl in the 7th grade," he thought when he saw her in music class.

While Baltierra had plenty of sexual experience — and unspeakable sexual trauma — before meeting his girlfriend, Lowell was a virgin. "Tyler really wanted to have sex, but I made him wait for about nine months," she writes. "I never worried that he'd dump me like he'd dump those other girls. Not because I was sure he wouldn't, but because if he did, that would just mean he wasn't the right guy for me. It was that simple. I wasn't going to compromise my self-respect."

After consummating their relationship, the couple began having sex "all the time" like "crazy, horny teenagers." During a wild night of drinking, they had sex in his mom's trailer outside her house. "Put your clothes on and get out here!" Lowell recalls Baltierra's mom screaming.

Before the couple welcomed Carly, Lowell admits she cheated on her boyfriend while briefly living with her grandmother in Florida. "He was this older guy who was chill and always had weed and cigarettes," she recalls. "I was always willing to hang out and smoke weed, and one thing led to another."

Baltierra felt betrayed, and says he became obsessed with the thought of her having sex with another man. "I could not stop thinking about the sex," he confesses. "The movie in my head was just them having sex. My stomach would turn, I'd feel nauseated. And I thought if I asked her everything and got the dirty nitty gritty nasty details, I could make the movie go away." During counseling, he later discovered that his childhood sexual abuse let to his obsession.