Folded Aces. Thoughts?

To start off, I had only recently started playing live regularly. Having a great session, I'm up about $500 on on a $200 buy in for the night at 1/2 NLH. (a fair bit for me at the time).

Villain is brand new to the table, maybe two orbits in. Involved in a fair amount of hands, but no real reads on 3bet play at the time.

PF:
I raise to $50 with AA and get reraised to $125. Easy call.

Flop:
9K3r
I check to V and he bets around pot size.

I tank for about 2mins, thinking the only hand that makes ANY sense here is KK. 33/99 wouldn't have reraised, right? Ultimately I fold and he agrees to show, showing complete air. something like 47o.

Looking back, he was dressed well and I could have read that he had "mess around" money in retrospect. Talked to him as i stayed for another orbit or two and confirmed that, but left as I was a bit shaken and doubting myself.

Just looking for thoughts on this fold. Also, if someone wants to plug it into a solver, I'd be curious to see what it says.