To be fair, it's kind of the author's fault for not giving more context/info on that. The author seriously makes her look like a leech, and it's already been 7 chapters.
Does she pay for rent and/or food? Is she putting in actual effort in finding a new place to live? Why go to someone she hasn't seen for 17 years instead of anyone else? Was he really her only option? We still don't know (we see her looking for a new place in this new chapter, but it doesn't look like she's serious about it).
It feels like the author thinks that the premise alone is all fine and wholesome from the get-go, even at face value with no elaboration. Like he can skip many important details and just jump straight to the fluff.