They enjoyed a rather public marriage between 1985 and 1989. But it seems that there’s no bad blood between Madonna and Sean Penn - as they proved when they took to the stage in Florida on Friday night. The divorced duo were taking part in Miami’s Art Basel, where they were helping to raise funds for the singer’s charity Raising Malawi.But, while that alone was sufficiently eyebrow-raising, the 58 year-old star stunned attendees when she declared her love for, and offered to re-marry, her ex-husband - in return for a $150,000 donation to the philanthropic foundation. Dressed in a typically revealing dress, the chart-topper seemed ruthless in her attempt to generate funds at the gala event, which also hosted the likes of Leonardo DiCaprio . Auctioning off various items, including a custom-made car and items from her wardrobe, Madonna made the unlikely offer while she was selling one of her designer necklaces.Clearly feeling generous, Sean happily made the $150,000 offer - but was ultimately saved from walking down the aisle with his former wife when another guest out-bid him.Source: Mirror