4c bomb pot spot with top set

$5 bomb pot, ~7 ways, ~$400-500 effective

Hero has 9❤️9♦️4♣️3♠️ in BB

Board 1: 9♠8♠3♦️
Board 2: 7❤️5♦️3♣️

I have:

- Top set on top board
- Bottom pair + gutter on bottom board

Checks to BTN who bets $15, SB calls, I just call, 3 others call.

Turn ($125):
Board 1: 9♠8♠3♦️4❤️
Board 2: 7❤️5♦️3♣️3❤️

I improve to trips on bottom

SB (tightish player) leads $30 into the field.

At this point I’m thinking SB can absolutely have 77/55 with a flush/straight draw on top potentially freerolling me, so I just call instead of raising. A couple others call too.

River ($245):
Board 1: 9♠8♠3♦️4❤️J♣️
Board 2: 7❤️5♦️3♣️3❤️7♦️
SB checks, I check, MP rips ~$240. Folds back to me.

Does anyone prefer raising flop or turn instead?