$0.25 / $0.50 PLO home game, flop action makes me sick

[Proofrock]

Mixed home game, playing our first round of PLO. Most of the other players in the hand are very inexperienced, and are primarily hold'em players. 9 players.

Hero is MP2 with $110, and [K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/spade.gif[/img]].
UTG+1 (straightforward player, overvalues overpairs and two pair hands) has ~ $100.
MP1 (tight player) has ~ $40.

UTG folds, UTG+1 limps, MP1 limps, Hero pots it, 2 callers behind, UTG+1 and MP3 both call.

Flop (~$15) K[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/heart.gif[/img].
UTG+1 bets $7, MP1 raises to $25, Hero feels sick and folds. Standard? Comments?