Did she actually just get jealous....Because of a child?
Really feels like an incel wrote that part. While some people can get possessive (either men or women), there's a limit to how psycho a person can be, without showing clear signs of it beforehand in order to be properly convincing.
P.S: Kinda unrelated, but it just occurred to me how utterly irritating the combination of stereotypical woman-jealousy is, with the utter ignorance and thickness of a Japanese MC.
On one hand, you have a psycho woman who clearly acts irrationally, while on the other hand you have a dumbass who will never say anything about that behavior to offset it. It just perpetuates to eternity, until some romantic bs event happens to calm things down, but never resolve it.