$50 AK semibluff or draw cheaply?

Villain is unknown. I'm torn here because I'm not sure I can get a random donk off a made hand here plus he's giving me good odds anyways.

PokerStars No-Limit Hold'em, $0.50 BB (8 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($79.40)
UTG ($22.25)
UTG+1 ($47.25)
MP1 ($23.65)
Hero ($50)
CO ($67.35)
Button ($34.75)
SB ($134.25)

Preflop: Hero is MP2 with A, K.
1 fold, UTG+1 raises to $2, 1 fold, Hero raises to $7, 4 folds, UTG+1 calls $5.

Flop: ($14.75) 2, 5, Q (2 players)
UTG+1 bets $2, Hero

I want to raise here simply because that bet is so ridiculous. $2 into $15 after you 3 bet him pre. Give me a break lol. I probably make it $18 and price myself into to calling a push, but maybe that's horrible spew idk.

It depends on his fold equity and how often he shows weakness with strong hands, he got maybe an underpair (JJ?) and wants to test the waters to see, if you have been reraising with AK. If the fold equity is high, I would always push in a big pot, with a flush draw (here U got two overpairs as well), especially if I were the preflop-raiser.