Madonna and A-Rod Hook Up on the DL!

Madonna and A-Rod were both in LA last week, but they were never spotted out together...course, that doesn't mean they didn't find a way to hook up!

Alex was staying at Madge's BFF and manager Guy Oseary's house, while Madonna was at her Beverly Hills Mansion. So when they wanted to see each other, we think Guy simply smuggled A-Rod into the Material Girl's house in his car!

They're both on their way to getting a divorce, so why are they going to such great lengths to hide their relationship?

And this weekend, they left for Vegas within just hours of each other. Think it's easier to sneak in the back door of a Vegas hotel than her house?