Summary
Byleth and Rhea are married, tied together forever. Yet Byleth has already lived one life and married someone else entirely; yet she promised HER they would be forever as well. Hmm. Lying about her past does her Byleth no favors, but embracing it is... hard. She has no idea how to be vulnerable but, that's what her and Rhea have in common right now. (Rhea/F!Byleth)