What a development. Alright, so it does seem to be hereditary, and once again, it explains a lot of stuff, from her childhood mood swings to everyone else in the mansion behaving weirdly accepting.
The "true love" condition is hauntingly deterministic though, isn't it? At the very start, she mentioned she already tried to bond with different men in different timelines, but it never worked out. And I'm pretty sure she adored Raymond in the first few loops, too, but that apparently wasn't "true" enough. Which begs the question...
Who decides that her love is "true"?
As of chapter 22, there aren't any potential male leads established other than Raymond (who, as we learned, just aint it) and Dullan (the one she hasn't bonded with once across all of these 100 lives). I do have a soft spot for Dullan, and I can see them having some sort of chemistry together, but we haven't seen much of them at all...
Well then, yuri route it is!