I have read this thread through my own eyes, as the parent of daughters. I see a young lady that felt comfortable enough with her boyfriend and self to come to his parent’s house and have the confidence to spend time alone to study for her exams and also get a little r&r plus meet his family.
She sounds introverted to me and jumped in when needed for helping with dinner, joining in on conversations and bright. All features I hope my young adults value in partner.
I imagine her boyfriend told her it would be a great place to study while he is out fishing, wanted her to meet his parents and that they are kind and easy.
As a wife that met my future husband’s family at a big catholic mass and christening (i am not religious) - I am glad they cut me some breaks :), as they were not thrilled we spent the night at a hotel prior to the event - i was the one that told them - as had no idea my boyfriend had told them we drove up that morning !!!