Check insta shove on flop?

MP is 87/25 approx. PT is playing up so havent got exactly AF or hands, but huge fish anyway

My only previous experience with this player was when I 3bet somebody to like $6 with QQ(not him) and he cold shoved $20 into the pot. He won with KK.

iPoker No-Limit Hold'em, $0.50 BB (6 handed) - iPoker Converter Tool from FlopTurnRiver.com



saw flop | saw showdown



SB ($42.20)

BB ($42.18)

UTG ($72.05)

MP ($46.39)

CO ($68.70)

Hero (Button) ($46.25)



Preflop: Hero is Button with Q, K

1 fold, MP calls $0.50, 1 fold, Hero raises to $2, 1 fold, BB calls $1.50, MP calls $1.50



Flop: ($6.25) 3, K, 10 (3 players)

BB checks, MP checks, Hero bets $5, 1 fold, MP raises to $44.39 (All-In), Hero ????