SB A7o vs. BB (LAG)

[AtlChip10]

PR 1/2 5max (5 handed)

Villain is BB and 58/13/1.25

Folds to me in SB with Ac7h, I raise, Villain 3bets, I call

Flop Kc9c8s...

I'm new to short-handed games, and my blind play in full ring is pretty weak anyway; so pardon me if some of my new posts are standard. With an overcard, bdnfd, and bdsd I'm assuming I don't want to fold here (especially if I'm best anyway). Do I ch/c here, donk it, or ch/r? Villain hasn't been all that crazy post-flop, so I'm leaning towards ch/c and folding turn UI, but I really don't know many good lines in these heads up situations. Thanks in advance for any help.