Hamptons beachgoers, beware: A cougar has been spotted!

Madonna and her 18-years-younger boy toy, Brahim Zaibat, canoodle on the sand during a weekend getaway on the East End.

While the odd couple kept busy with grown-up games, the Material Mom’s children David Banda and Mercy James played nearby.

The pop diva, 54, and the French hip-hop dancer have apparently resolved their differences after splitting in May.