Sorry, the movie night will be more focused on Marc, Katherine will have her moment and some more in the future. I know that for now, the lesbian road seems poor, because it is, but I have to do this with some logic, Myriam is curious but has never been with a woman before, she won't go full on lesbian without a bit of work.
But there's multiple character coming for this road and more to come, it'll just take a bit more time to build up the "set". About the sadness/happiness, it's the same, there'll be more changes once Myriam start having some real relationships.
No problem, I'm kind of immune now, since I answer fairly regularly here, it's quite often that I've to answer the same questions... ^^
But I understand, we all have our times when we're just too tired to bother.