Big Drawing hand, advice appreciated.

[goodluck2me]

hi, long term poster at a few sites my first dabbling in 2+2 hope you will be nice. ive heard great reports from this site so here goes...

playing PLO Live 1-1 ( we are down to 6 handed)
Stacks hero (390)button
Seat 1 750 (SB)
seat 4 680 EP

Ep makes it 5, standard open for him with any cards he likes, i call with Qc9cTsJs, SB pots it. EP and I call.

Flop comes AcQsTd.

Seat 1 pots it for 60, the EP makes it 220... and I? big wrap, 2nd nut flush...

Whats my line here?

comment appreciated on all aspects, ty.