Its a 2/5/10 game in Mexico city with recreationals and everyone has at least 500, there's a mississipi straddle and I limp 8s7c on the co with 6 limpers, btn checks his mississipi.

Pot 80 flop 6s 5s 4c, utg+1 (1.2k) bets 40, utg+2 (550)raises t80 , i call (750), only utg+1 calls.
utg+1 have seen him raising otf and barreling tp mediocre kicker type hands vs preflop aggressor, or sticking it in on the flop with same kind of hand.
utg+2 a spewy and sticky player, incapable of folding hands.
Just nonsense to try to slow play here?,

320 turn Kh utg+2 bets 150, i call, utg+1 calls
i thought i was getting utg+2 chips no matter what, so, again, just nonsense to call to try to to win smth extra from utg+1?

770 river 6o (final board 6s 5s 4c Kh 6c) utg+2 bets all in 310, i tank call about 2 minutes with 200 behind, utg+1 goes all in, me ???
After utg+2 goes all in, worth to jam myself?, as played, i have to call 200 to win 1900, can I assume utg+1 might be doing this with 73s, 43s type hands, and I just need to call 100% of the time vs his jam?