Bet or Check?

[Schneids]

4 handed game, my button.

Sansone limps. I raise with A7o. Betsysue calls in the SB, Steve95 calls in the big blind.

Flop Tc 5s Ad; I bet and only Sansone folds.

Turn 4d. I bet and nobody folds.

River 3s. If it's checked to me can I bet?

Steve plays too loose pre and postflop, plays too aggro postflop with hands that most people would stop a bet or two sooner with. He pushes a lot of things hard so him check/calling suggests to me says he likely does not have top pair. His range can include any straight draw (broadway or wheel), as well as any non top pair. I think about the same hand description is likely for Betsysue, though it's slightly more likely she has an ace. If she has an ace it's likely to be a small one since she did not three bet PF. She plays a little better than Steve both pre and postflop. I think a ten is probably paying off a river bet though that too isn't a guarantee.