I don't watch any apartments where there are no new people introduced. Nina/Alan/Serena used to be my 2nd favorite apartment slightly behind Alex and Anna but lately I haven't bothered to check in for a while, not with all the new apartments being introduced doing all the things I like to see. What would really help this place is new friends, ideally for them to have fun with sexually but practically just to add some new chemistry to the place. They don't even hang out with Edda and Joe anymore which was becoming stale in itself, but them isolating themselves to this apartment with only the three of them makes things 10 times worse.