NL100 | bottom set 221bb deep, 3way, 3bet sidepot spot on ugly board

[Slap My Jack]

Donk has extra monies as insurance incase the nit has an over set.

Donk can easily have two pairs, we're only really worried about a straight from the donk. AJ, AT, JT, JJ, TT, AK, AQ, KQ. Donk might even bluff the turn with draws after everyone checks.

Button nit I don't think checks KK/AA behind. I'm really just worried about JJ. Some nits don't 3bet that vs an UTG raiser. I think he bets TT as well. I don't think he 3bets KQs. AK is certainly in his range.

I don't calling 40BBs just to fold. The nit isn't a big consideration after we put in so much money.

Conclusion: I think a fold preflop is alright unless the donk is a big spew showdown monkey.