How would you proceed in this multi-way unraised pot with bottom set?

iPoker skin Nl100$

I have about 125$ in the BB, UTG has me covered and the rest of the table has between 65-100$. I have no real reads on UTG, seems like your average donk but I haven't seen him show down much he plays 35/5/1 over about 75 hands for what that is worth.

I get dealt in the BB.

UTG player limps, 4 other limpers, the SB completes I check.

Pot is 7$ with 7 players still in.

Flop:

SB checks to me, I bet out 6$, UTG immediately raises it to 18$, folded back around to me.

What is the best line here against your average donk? Re-raise AI, call and lead turn, re-raise to 50ish?

meh i call the reraise and on a non spade turn i CRAI. if i get set over setted oh well. could be a semi bluff could be AQ could be AA/KK looking to limp/reraise. could have 4/6 spades.

anyway im curious what others would say.

Call and crai on any non-spade turn. He has AQ or a big draw way more often than 55 here. Maybe [4s]. Except his postflop aggression is so low, he probably doesn't raise a solid bet with just a draw very often.

I think most donks with 55 (let alone QQ) feel unbeatable here and call hoping to get some more callers behind them. On general principles I go bust set over set on the flop.