I don't really think this is very close at all. I think you have to bet the turn.

When I'm playing a multi way pot in general I expect decent players to play more straight forward. This is especially true if there is also a fish in the pot. Therefore, I'd only expect him to bet a pretty strong range for value on the turn. I wouldn't really expect him to bet 77-TT. And even when he does bet a hand like KQ on the turn, I'm not sure he's stacking off. So IMO you're not gaining anything by checking turn because anything he's going to bet he's going to call your turn bet with. Plus, when you c/r him you might be missing out on a small river bet when he folds turn when he would call like a 1/4-1/3 value bet on riv. Plus, when you check and it checks through thats clearly a disaster to be giving free cards to two opponents.

To me its a clear bet on turn.