It's very cliched but not in a terrible way. It's still a fun read and I do want to find out if she is actually illegitimate or not.
I'm actually super invested in this and want to find out who and why all his wives keep dying and what it has to do with the capital?
I've read to the 30th chapter and I enjoyed it, yes it's a predictable plot but the MLs aren't heinous, the family is supportive and while she has cheats it's nothing super over-powered. I would say the plot is almost similar to A Fortune-telling Princess, but a lower quality, I would give it 7.3 out of 10, I will continue reading it
I'm so excited I hadn't heard a thing about this getting an anime and then I happened across episode one and literally screamed out loud
https://www.mangago.me/read-manga/sono_kuchibiru_ni_ai_wo/
This is along those lines.its an older style manga though.