hmm ngl I think... this kinda makes sense. Like I know people pleasers that would actually do this, and also its hard to accept for some folks but going out with someone for 1 month is not that hard, like one does not have any points of interaction outside of planned dates, then thats like 3 meet ups played correctly, 2 if she really wouldn't want to see him a lot but still wants to fulfill the condition or smth. Thats totally doable and preferable over feeling guilty for possibly months because some poor women you might know real well is feeling depressed over her son.
Also I completely get the MC, as I know people with low self esteem and how they argue. Her actions are just plain unrealistic, like c'mon thats not happening in 1 million years. There are some ways why I'd assume she would do this: Most obvious the moms paying her, right after that is she wants to get money out of him and his family, there are a surprising amount of people getting money by using lonely peoples desperation to find love and just cus she bought some coffee, doesn't mean she ain't want some money, third is kink, some people really do like playing around with others usually abusing them emotionally once they made them feel attached.
So this chapter made the story more realistic in my opinion. Is it still unrealistic and won't ever happen irl? Yes, is it now possible? Yeah.