I'm pretty certain they're setting up a future gangbang with the young guys. Scenes like that though, take up a lot of time, because renders involving multiple characters take much longer to produce. That's the main reason why you don't see a lot of gangbangs or orgy scenes in adult games.
Both the Devs have stated in the past, that they'd really like to do some big scenes where Anna has sex with a lot of guys and/or girls. So it will probably happen before the end of the game. Such a scene though would probably encompass an entire update, so it's probably something that will occur nearer the end. Before then, I think we will see some foursome scenes with Anna and three guys and/or girls. We have actually had one foursome scene, when Basher and Leslie fucked Anna and Emily in Patrick's Bar, and it's interesting to note, that update was the longest one we've had to wait for in Chapter 2 ( the Devs needed an extra month to produce the renders for that one scene). So if you want bigger scenes, you have to be prepared to wait longer between updates. And unfortunately, a lot of people aren't that patient.