T.I. was caught by prison officials this weekend in Arkansas getting "frisky" with his wife during visiting hours.

T.I.'s wife Tiny admits the two were in a room together during regular visiting hours at Arkansas State Prison when Tiny grabbed a hold of the rapper's shorty....(and well, started well you know....)
According to prison guidelines, inmates are allowed to kiss and embrace at the beginning and at the end of a visit as well as hold hands -- but "the inmate’s hands must remain in plain view of Visiting Room staff at all times."

Tiny tells TMZ that T.I. was reprimanded and sent to a  "Special Housing Unit" -- which consists of more security and less freedom.

Tiny says she hasn't spoken to T.I. since the incident. She hopes she'll be allowed to visit again soon, but she'll need to keep her hands to herself.