Married Sims can't pass Lover status(iE become Soulmates)

I’m on console and I am having the same issue. Her parents had the soulmate status but her sister couldn’t get it either. At that time I assumed it was because of their conflicting traits(good/evil). However the sim I’m playing now and her husband can’t get the soulmate status and they don’t have any conflicting traits like the first couple. I’m trying not to use cheats so I can’t just use a cheat to bypass the Soulmate aspiration