I'm in the BB with [9s] and $430. Villain limps from cut-off with $600. Irrelevant SB calls.

Villain is loose-ish (not using PT), haven't noticed him raise this much. I don't recall seeing him in any big pots, or making any raises. We've only played 30 odd hands together.

Flop is [Qc][9d], $12. I lead for $8 and villain raises to $20. SB folds.

My action?

While posting, I realised that he had raised me before, in a 4 way ace high pot ([Ac][2h][6c]), checked around on the flop, I led the turn when the hit and he raised me (I folded). Same amounts. Probably not relevant.