Definitely not. Subway is for everyone to commute comfortably. Sitting on someone's lap like that can make others feel uncomfortable and it also goes against basic public behavior rules. There should be personal space boundaries in public areas.
In a 'wife sits on lap story', perhaps they are reminiscing about old times. They might be looking through an old photo album together, and as she sits on his lap, they laugh at the funny memories from the past. It's a sign of their comfortable relationship.
I'm not sure specifically as I haven't read that particular fanfic. But it could potentially be about a moment of interaction between Annabeth and a character named Pervy, perhaps in a context within the world of the original story it's based on.
Yes, for example, in a family gathering when the son is young, the mom may sit on his lap playfully for a brief moment to share a joke or a warm family story. It can be a sign of a very close and affectionate family bond.
One 'mom sits on lap story' could be a heartwarming moment when a young child is feeling scared during a thunderstorm. Mom sits on the child's lap to comfort them, and they read a favorite book together. It's a simple yet powerful moment of bonding.
One story could be when a couple was at a family gathering. The husband was feeling a bit tired and stressed from all the socializing. His wife noticed and sat on his lap, giving him a warm hug. She whispered kind words in his ear, reassuring him. It was a simple yet intimate moment that showed their strong bond.
Obviously, Annabeth and Pervy are the main characters based on the title. Annabeth is likely a well - developed character from an existing story, and Pervy is a character within this fanfic.