PLO 0,25/0.50 at b2b

I saw the villian check-call a set of aces on the flop against the preflop raiser several hands ago.

I have AA76 with A7s in the BB. Table is 4-handed and it's limped to me, i minraise and all call. Flop is KT7 with 2 hearts (my suit), i pot and get 2 callers. Turn is another 7, giving me trips with A kicker. I check, they both check behind. River is a 6 giving me 7s full of 6s, i bet 5e (pot is about 16e) and villian raises the pot, other guy folds.

Should I have..

Potted the turn?
Check-called the river?
Call his re-raise on the river?