Louise says they can’t meet at her house to study as her mother is having an affair.
Nobody comments on this or asks why it affects them meeting – does Louise’s mother need the house to herself all weekend for her affair? Couldn’t she meet her lover elsewhere, or simply skip seeing him for a single afternoon? What does Louise’s father do on the weekends while the house is off limits to other family members’ activities in order to accommodate his wife’s affair? Has the house somehow been tainted by “affair-ness” so that nobody is ever allowed to visit?
These questions shall never answered. As Louise’s story doesn’t make sense, she may be making up an excuse that nobody will question out of embarrassment.