150/300 stud high reraise or call on 3rd?

[TStoneMBD]

the 5 is a fish, im not sure what the 8 is but he seems sane. he probably has a 3flush. this is a 150/300 ERS game at commerce.

8 handed game. dead cards are irrelevant. all my tens, aces and spades are live.

5-COMPLETE-call
8-call-call
Q-raise-call
TsAs-Th-reraise

5T-call
86-call
QA-CHECK-call
TA-TJ-bet

basically, should i reraise 3rd to get the dead money in the pot in a coin flip situation or should i keep the other players in by just calling? i didnt anticipate that both players would call the reraise but thought it was quite possible. on 4th do i check at this point?

ps, noone caught a 2flush on 4th. i was planning on checking 5th.