BigO: Bare low on turn w A25JK facing a raise

8-handed. BB has 125, I have 1000. BU has me covered.

Suits don't matter in the hand.

I open limp UTG w A25JK and three more limp after me, including BU. SB folds and BB checks.

Flop [pot:25] 953r
BB leads by pot 25. Only I and BU call.

Turn [pot:100] 6r
BB pots all-in for 100, I call, and BU pots to 400.

Questions

1. What is our plan from the above point on?

2. Assuming my stack is as deep as BU's 1800, will that change our play?