$100 ace high flop call with TT

[veryblind]

Live 200NL
villain is LAG with $200

Preflop: villain raises in MP1 to $25. folds to me, I raise to $100 with T[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/club.gif[/img] to isolate, villain calls

Flop($200): A [img]/images/graemlins/club.gif[/img] 8 [img]/images/graemlins/diamond.gif[/img] 7 [img]/images/graemlins/heart.gif[/img]
villain pushes for $100

call?
The all-in flop didn't make sense to me. If he had an ace, he should expect me to bet something so he can c/r since I was PFR. If I don't have an ace, he must think that such a bet is likely to fold me out. With a rainbow board, he shouldn't be afraid of draws (he shouldn't put me on 9T, 69, or 56 with PFR).