http://www.gambling-law-us.com/
In summary, Texas home games are legal so long as:
(1) the gambling occurred in a private place;
(2) no person received any economic benefit other than personal winnings; and
(3) except for the advantage of skill or luck, the risks of losing and the chances of winning were the same for all participants.
so basically, in your home, non-raked, non rigged games are legal...