Jeff Bezos and Lauren Sanchez got their own not-so-little ‘Love Boat’ floating off the coast of Italy, and none other than Oprah Winfrey is up on the lido deck with ’em!!!

As for what they were chatting about — super-rich stuff, no doubt — but it wasn’t all biz, not for the hosts, anyway … ’cause Mommy and Daddy couldn’t keep their hands off each other.

Get used to this kinda scene aboard the SS Sanchezos … we hear Oprah’s just the start of a celeb parade aboard Jeff’s ship. They’ll be celebrating all summer with several groups of their famous friends coming aboard.

