Madonna & Sean Penn Sean Penn's Got Me in Handcuffs ... Just Like the Good Old Days

12/3/2016 7:49 AM PST

Sean Penn slapped the cuffs on Madonna and it only cost him $150k -- instead of marriage and a messy divorce.

The exes ended up on stage for Madonna's charity event -- Raising Malawi -- during Art Basel in Miami. She told the crowd she'd marry Sean again if he bid $150,000 for a necklace, and he did.

He was outbid for the jewelry. As for the marriage part? The jury's still out.

Watch what happened when Madge called Sean on stage -- she's professed love, but she's done this kinda thing before

#TheExWhoCriedWolf