So, how about this,
We write a Collab, where I'll let my [Name] in you're fanfiction as a special collaboration chapter, and you get to write whatever you want with [Name] in there, considering she is Rimuru's wife. But, don't make it too.. inappropriate.
I get to write Rylas entering 'mythically yours' world as Rimuru's and [Names] child as a special collaboration chapter also.
You can reject this idea if you want to, I just feel tinsy winsy guilty to not make rivalry between [Name] and the original love interests.