How far do you go with weak overpair?

[RikaKazak]

Villian is a 25/9 with AF of 3 after 49 hands. I'm playing semi tight, probably a 24/12, I c-bet heads up 99% of the time heads up, and 3 way about 60% of the time. The villian and I have yet to be in a hand together.

NL 400 partypoker 6 max

fold, villian limps, hero raises to $25 with black T's, folded to villian who calls.

flop comes 863 with club draw. villian checks I bet $40 into $55 pot, villian check raises to $90, hero? it's $50 more to call. stack sizes $400.