Should I ever get away from this?

[Jake (The Snake)]

Not a great read on MP1 yet. Seems to play semi-tight and takes forever to make decisions. I have not seen him do anything remarkable (great/poor) yet either.

MP1 raises and folded to me in BB with KK. I 3-bet and MP calls.

Flop comes ATX rainbow. I bet, villain raises, I call.

Check/call. Check/call.


I still feel lost in some of these HU situations, especially when OOP. Looking back, I can't see how villain would bet the river without an ace. But OTOH, I've seen so many ridiculous things in HU pots that I feel like opponents are always trying to bluff me. Is this call down poor?