Too Loose of a Call vs an Unknown?

Sorry if this is absurdley standard but I think I'm leaking a lot with big overpairs. Pokerroom and I have no stats or reads on this guy yet.


Texas Hold'em $1-$1 NL (Real Money), #88,214,666
Table Jersey City, 21 Mar 2007 9:02 PM ET

Seat 3: max682 ($44.35 in chips)
Seat 5: tirvakkaa ($80.40 in chips)
Seat 6: N.Nivus ($450.85 in chips)
Seat 7: Galapogos [ Q, Q ] ($106.25 in chips)

Antes/Blinds
Galapogos posts blind ($0.50), max682 posts blind ($1).

Pre-Flop
tirvakkaa bets $3.50, N.Nivus folds, Galapogos bets $13, max682 folds, tirvakkaa calls $10.

Flop [board cards 5,9,2 ]
Galapogos bets $20, tirvakkaa bets $66.90 and is all-in, Galapogos calls $46.90

I think folding would be a leak vs an unknown.

Standard call in my book. AKs perhaps?