The rap star is serving a year-long sentence at Arkansas State Prison for violating the terms of his previous probation, stemming from an incident in September of 2010, when he and his wife were busted for possession of ecstasy in Los Angeles.
According to TMZ.com, guards caught T.I. and Tiny engaged in the sexual act during regular visiting hours at the prison, which adheres to strict guidelines when it comes to prisoners and visitors.
As a result of their sexual escapade, T.I. was sent to a "Special Housing Unit" for an undetermined amount of time.