1/3 Flop vs donk

1/3 9 handed

V looks indian. Just sat down not too long ago. Saw him play 1 hand.

HH
V opens 15 in UTG+2 w/KQo, like 4 callers.
Flop 775dds all check
Qs V bets 45, Btn calls
8 blank V checks, Btn bets 80, he calls and win.

Effective stacks 600
Hero is utg with the rock straddle(5), all folds, V in bb completes for 5, Hero has TQhh opens to 20, V calls.

Pot 41
Flop AT8ss V donks 20, Hero?