Turn decision

Saturday afternoon Bike game.

Older player who plays too many hands and is a tad loose opens UTG+2. Two callers including the bottom. I call with 85s from BB.

Flop comes A 7 5 rainbow with one to my suit.

Opener bets, two calls, and I call.

Turn is an 8. Opener bets, fold, and now button raises.

My default before there was any action was to check raise. I had never played with the button before. Supposedly he was a movie producer. In our 30 minutes of playing together I would describe him as a semi maniac. I saw him call three bets BTF with 82o and of course he flopped three Deuces.

What’s my best play?