This Romantic World Page 434 (Patreon)

In most cases Jane is a fairly antagonistic character. But one aspect of her that I'd consider a positive trait is that she really enjoys seeing people get together. From random hookups to full blown relationships, she loves to see it and will match-make whenever possible.

So having said that, I imagine that she would have picked up on Lydia and Halver immediately. And she probably spent the whole week since trying to gently coax Lydia into admitting it. 

PS I'm now open to suggestions for zany sexual background antics because I feel like I've already done most of what I can think of over here. XD