50NL - Nut Flush vs. likely full house

[Dynamic]

No reads. Just wondering what the proper play would be in this scenario. I almost folded due to the way he played it. I could see him playing 88 or TT like this. I think folding could be ok here. Thank you in advance.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter

Stack sizes:
UTG: $3.90
UTG+1: $104.85
CO: $88.40
Button: $50
Hero: $91.05
BB: $30.70

Pre-flop: (6 players) Hero is SB with A[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/diamond.gif[/img]
UTG folds, <font color="#cc0000">UTG+1 raises to $1</font>, 2 folds, Hero calls, BB calls.

Flop: K[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/club.gif[/img] ($3, 3 players)
<font color="#cc0000">Hero bets $2</font>, BB folds, <font color="#cc0000">UTG+1 raises to $6</font>, Hero calls.

Turn: K[img]/images/graemlins/club.gif[/img] ($15, 2 players)
Hero checks, UTG+1 checks.

River: 4[img]/images/graemlins/diamond.gif[/img] ($15, 2 players)
<font color="#cc0000">Hero bets $3</font>, <font color="#cc0000">UTG+1 raises to $23</font>, Hero calls.

Results:
Final pot: $61
<font color="#ffffff">UTG+1 showed Ts Ks</font>
<font color="#ffffff">Hero mucks Ad Td</font>