QQ overpair vs gambler and father time

2/3, no 10 straddle on this hand.

Playing 7 handed.

V1 - asian reg who likes to gamble and play PLO. Hes waiting to get on PLO game. He's not a maniac, but loose and will bluff.

V2 - father time. This guy is crazy old, probably 90. I cant believe he is playing at 11:30 PM. He is of average live looseness and ive seen him get sticky a couple times and he is very passive, he has not raised his strong hands pre or postflop and has rarely bet himself.

Hero opens 15 from UTG+1 w red QQ.

V1 in SB, and V2 in BB call. Everyone else folds.

Flop 6d 4d 6c

V1 donks out for 25. Im cool with it, planning to call down and let him keep blasting.

Now V2 unexpectedly calls as well.

I did consider raising flop, but im not sure about V2, and there is a possibility V1 is just betting his trips right out.

Turn 8c

V1 continues for 75. V2 calls again.

Hero?