100nl AKo vs loose fish + reg

opener is 53/30 with 17% 3bet and 25% fold to 3b over 60. he has busted and reloaded once. his second BI he ran up to ~240bb and is now borderline busto and probably pretty tilted or just spewy all the time.
notes read:
- min 3b/call large 4b w/ATo in BU v CO. jam over CB on J82t
- OL/3b jam 80bb on BU over SB 5x raise
- 3x open/4b jam 33 in HJ vs CO 3b + BU flat
- open/call 3b w/ATo UTG, C/C 3 streets on Q63T9

button is 17/13 with a 6% 3b and 84% fold to 3b. over 180
only history is he 4x 3b/5b jammed AKo on BB vs my BU open/4b. i had KK.

is the BU's range capped due to flatting pre? he probably should be flatting hands like AA/KK here because the fish is jamming over me close to 100% of the time, so flatting AA/KK gives me more of a chance to make a mistake with hands like TT-QQ,AK. but fuck knows if he knows that or not. no idea how many tables he's playing.

oh yeah and BU has seen me 3b AQo in UTG+1 vs fish's UTG opening range ~100bb deep (the last hand in my notes vs fish) if that's of any relevance.

PokerStars No-Limit Hold'em, $1.00 BB (8 handed) - PokerStars Converter Tool from FlopTurnRiver.com
UTG ($46.10)
Hero (UTG+1) ($215.80)
MP1 ($120.40)
MP2 ($100)
CO ($100)
Button ($228.90)
SB ($138)
BB ($112.65)
Preflop: Hero is UTG+1 with K, A
UTG bets $4, Hero raises to $10, 3 folds, Button calls $10, 2 folds, UTG raises to $46.10 (All-In), Hero ($205 effective with BU)?

Wow this is a really tough spot with that btn in the mix, I mean without him in it it's a pretty ez snap call. I might 4b all-in here to attempt to get it HU. The fact he could be limping AA/KK if he KNOWS that, but you have no reason to think he does or doesn't apparently, does make it like hmm do I fold/call/shove...Damn. Man, he cold called a 3bet and hes folding like 84% of the time to them. I mean what does he do this with? He must have made some adjustment here if he's not completely retarded and he's got a big hand. I don't mind a bigger sized 3-b here due to villian going to be shoving anyway. Might influence btn to fold most of his hands instead of cold calling. I'm completely unsure, but personally I might overshove just to attempt for HU. If opponent is thinking on the level of limping the AA/KK there, which is unlikely due to your blockers and shit so I'm thinking shove to get it HU.

Small sample leads me to believe that most hands with btn were on that table. If so, then he isn't adjusting to there being a whale on the table and we can prolly jam safely.

BU villain is on two of my tables and this is the first time we've played together. i dont understand how that implies he hasn't noticed the whale though?

He should be in quite a lot more pots than that. Small chance he's just running terribad. Or he isn't adjusting and that's the same to us.