You know Fooxied does encourage people to wait and download the game during major updates, right? You don't need to get the X.1 or X.2 updates, which usually don't have too much happening save for the side stuff.
But to answer your question, no, Riley does not have actual sex with anyone in this update. At least not on-screen. It was still a pleasant update that makes 4.0 out to be a very, very promising one given the events hinted at by various characters.
Also, remember that Riley has literally just learned that her husband might be a cuck, it's gonna take her a hot minute to accept that and start exploring. If you're that impatient and want to play a fuck-fest, go play Lisa or something.