One of the ideas for my book is for both the MC and her love interest to live together (more importantly, for her to live together with his family). This is quite tricky because it is such a popular idea; however, it would benefit my plot greatly for this to happen. I need an authentic reason for my MC to "stay with them for a while", but I'm struggling to come up with one that would put an original twist on such a cliché idea. I thought about one way, which was that her brother (who is her guardian), goes to their parent's high school reunion in place of their parents. While doing so, he meets the MC's love interest's mother, who immediately remembers their mother, saying how it was a tragedy how she died (details of her death are irrelevant at this point, so I won't bother going into detail). She then offers to look over the MC in times when her brother is out of town for different conferences - especially since he can be away for a couple of weeks at a time. The flaw with this idea is that I feel like it is missing something. Should I scrap it altogether and go with another idea? If so, what should it be? Thanks for the help in advance!