At what point do you call a riv bet HU w. A high?

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live 40/80 at commerce last night

7 handed

asian lady raises MP1, fold, I 3-bet AQo in the CO, the big blind calls, lady calls.

K[img]/images/graemlins/club.gif[/img] x[img]/images/graemlins/club.gif[/img] x

check, check, I bet, call, c/r, I call, bb calls.

x non club
check, check, I check.

pairs one of the flop x's (non-club)
check, lady bets, I inta-call, bb folds.

lady shows AJ [img]/images/graemlins/club.gif[/img] and MHIG.

total pot (~10 bb)

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When you make a call like that aren't you kind of afraid of the BB calling with something like middle pair? If the guy is loose you don;t really want to invite overcalls.