A table of unknowns, Hero in MP and is dealt A♦ A♥ (Hero stack approx $300). UTG +1 limps, I pop it to $15, folds to BB who calls and UTG +1 folds...heads up (Villain stack also roughly $300). Pot $25 after rake.
Flop Q♣ 6♦ 3♣. V checks, Hero c-bet $15 and V calls (pot $55).
Turn 2♠, V checks, Hero bets $35, V calls (pot $130)
River 2♥ V leads out for $75
What do you do? I can't find a deuce he is defending with and check calling, maybe a suited 2♣ 4♣, pocket 6s or 3s. I rule out QQ as I think this would have gotten more $$ in before river. I would think more $$ would go in with a 54 as well. Paired board leans me to believe I'm walking into full house with the 66 or 33. Thoughts?