Sarah Palin and Levi Johnston Photo by: William T. Wade Jr / INF, Chuck Kennedy / Landov
Sarah Palin's Camp Lashes Out at Levi for Sex Talk on Tyra | Sarah Palin

Levi Johnston is in big trouble at the Sarah Palin household.

After talking about sex on The Tyra Banks Show, Johnston – the 18-year-old father of Bristol Palin's baby – was hit with a blistering response from Bristol's family.

"Bristol did not even know Levi was going on the show. We're disappointed that Levi and his family, in a quest for fame, attention, and fortune, are engaging in flat-out lies, gross exaggeration, and even distortion of their relationship," says the statement from the Palin family rep, Meghan Stapleton.

"Bristol's focus will remain on raising Tripp, completing her education, and advocating abstinence," the statement continues. "It is unfortunate that Levi finds it more appealing to exploit his previous relationship with Bristol than to contribute to the well being of the child."

The statement ends, saying, "Bristol realizes now that she made a mistake in her relationship and is the one taking responsibility for their actions."

In the show airing April 6, Johnston tells Tyra Banks that he believes Sarah Palin knew he and Bristol, 18, were having sex when they lived under her roof. "I'm pretty sure she probably knew. Moms are pretty smart," Johnston says.

The couple, who were high school sweethearts, planned to wed after graduating – but ended up splitting earlier this year. At the time, Johnston told Good Morning America that he needed to mature before getting married.

Family Member Arrested

In other Palin family troubles, the half sister of Palin's husband Todd was accused of breaking into the same Wasilla, Alaska, house twice to steal money, the Associated Press reports. Diana Palin, 35, was charged with felony burglary and misdemeanor criminal trespass and theft stemming from two break-ins this week.