Alpha's Married Human Mate incelemeleri

I'm getting confusing vibes from the book, I'm now just waiting to see where this all goes, I'm currently hating the female leads weakness, I cannot fir the life of me fathom why women allow themselves to be treated as door mats, right now I'm confused on whether they are both her mates, or if Henry is some sort of evil sent to break them apart or break Derrick, also the elder, is she just wise or some kind of other being?