facts. if you think about it politically or even morally, ruining a whole household for the sake of love is a tad bit...too much, or even going down a reverse harem route, that's just...unrealistic if you consider it seriously. if this were reality, it wouldn't be all doki doki heart kuni as it's depicted here, a meta-isekai, or in typicaly shoujo manga. sometimes these things can work out if the author really tries, sans certain in-universe repercussions, or the author will ignore the aftermath altogether.
that said, this is cute ig. the heroine and patrick aren't just simply dumbasses pointing fingers at mary for her halfassed/obviously faked villainness