huge laydown on the bubble?

[marbles]

Single table, 4 remain, top 3 are in the money. Small stack is UTG+2, and cannot cover his BB.

Blinds are now 200/400, and, after checking the BB, you have a stack of $520. You have Td5c, heads-up vs. the SB, who limped (he is a solid player, big stack with approx. T2K after limping).

Flop: AdJs4d. Check-check.
Turn: [8d] AdJs4d. Check-check.
River: [Jd] 8dAdJs4d. SB now bets. Pot is now $1600.

All-in or fold?