They're doing a movie where they are playing lesbian lovers. They seem really excited about it.
Beyonce to star in lesbian flick with Eva Longoria - New Zealand's source for entertainment news, gossip & music, movie & book reviews on Stuff.co.nz: "Eva, one of the stars of hit TV show Desperate Housewives, said: 'Yes it's true. We are talking about doing the movie together. It's such a wonderful novel, a beautiful love story.'
A source revealed: "They weren't at all coy about the sex scenes. In fact they both seemed to think it would be more fun than doing the same work with a man. It's going to be very hot.""
I don't think this is coincidence, they're bi.