Not in this update, but there will be in the future for sure. I have a big planning document for hookups, and one part of that is a matrix of which guys have enough of a connection to be involved in a threesome.
That's just for sex, though, there won't be any throuples or anything. I'm not opposed to it, it's just the level of complexity to make it happen would be too much to handle in an already complex game.