Some chapters, specially the newer chapters these past months is an older version of them. In fact, it's said that the whole manhua is a recap of their memories.
I mean they don't actually do it, he's just having a juicy wet dream... So I guess you are probably right that they won't do it any time soon... ╮( ̄▽ ̄)╭
One time someone tried to sex talk me in this comment section. Idk why they were trying to sext someone on a illegal website but wtv they do them.