Is calling this dumb?

[doubledummy]

I'm sorry for the way this will be posted but I don't have access to the hand record so cannot post it in the usual way.
I'll try to provide as much detail as I can.

Playing at a $25 NL table. I have $28 UTG+1 has $31 M3 has $24.75 all other are irrelevant.

Dealt KT spades on the button, UTG, folds UTG+1 Raises to $1 2 folds, M3 calls folded to me I call both blinds fold. Pot=$3.35
Flop 10c As 6s
UTG+1 bets $4 M3 Raises all in.

Here is the question, with Middle pair and drawing to the nut flush is it a good call. I suspect 1 of them to be on either trips, 2 pair or TPTK.

Thanks in advance and sorry for posting the hand this way.