You know with how Iris brings up how they technically never broke up a few times . I sometimes wonder if you piss her off later if she will bring this up up to Alexis and that could get her to break up with you lol. Especially when she finds out she can't go for Erynn anymore
I don't think that'll happen for a few episodes yet. When did Nyx start resolving pointless drama quickly

The whole Santi stuff could have been pretty much closed at the pub too, but she artificially prolongs that story line as well for god knows how long.
With Ethan coming to a close, and the fact that he knows John is Erynn's father(and intends to use this in some fashion) i think Erynn will learn of her John connection pretty soon, around the same time Ethan vanishes(thank God).
Melissa and John have all these plans on how to break down the news for Erynn, but i don't think they'll have much of a choice in the reveal.
I think it's more of a timing thing than a chronological thing. So Iris took a couple of days, Lexi jumped on his boner after a couple of hours.
Several characters get their first sex scenes right after their introduction, Iris, Nikki/Cara, Tori, Mira and Lakeyin too, but there's implied passage of time for all of them.
For Iris it looks like a few days have passed since their first meeting.
For the sisters somewhere from a few weeks to a month plus.
And Mira has known the MC for a while before they had sex for the first time(not shown), same for Lakeyin.
Tori is one that might be on the first day too, we meet her at school, later she approaches the MC at the bar... i don't remember if it's the same day or the next... but definitely easy and fast, it's simply her wanting to get a go with the new guy before anyone in school, it's not even crucial for her path.