Quite near the start of their relationship, he tried cooking once. Once. It's edible, but she still very silently took the utensils from him and told him that the thought was nice, but anything a bit more complicated he should rather leave alone. He agrees very much with that.
Who does the laundry and other chores:
Most of them seem utterly useless to Peter, and therefore sees no use in doing them, but then she uses that look and just gets very, very calm and he finds himself doing it anyway.
How many children do they have:
sobs about it Probably a lot. He very much likes the idea of children, and he very much likes the idea of a pregnant Letha, and she thinks he makes a far better father than he would consider himself, and lights up whenever she sees him with children. Even though I can see her just putting a stop to it after four or so.
If something needs to be done, Letha. She can be very, very persuasive. In playful fights, however, he clearly has an advantage.
Favorite nonsexual activity:
Peter likes to tell her stories, favorable with her head against his shoulder, one arm around her. Or playing with her hair. He really has a thing for her hair.
Their favorite place to be together:
One time, he just decided to take her outside in one clear night, by the riverside of a nearby lake, and tried to catch her a fairy. He didn't get one, but she laughed a lot, and that stayed one of their both favorite memories. They sometimes still come there, but they never again got to see the fairies again. Letha told him he scared them. He grinned at her.
Not really a tradition, but when he doesn't want to continue a conversation, he just starts to kiss all over her shoulder, and she usually hits him playfully in return, laughing.
( Just like ships, we float through each other's lives / Through the waters of beauty and grace / We will one day dock at the same port / And give rest to our weary legs)
What they do for each other on holidays:
Small things. He usually steals brings her small gifts, something that reminded him of her (that flower has the color of your eyes), she likes to leave trails for him to follow.
Where did they go for their honeymoon:
Roadtrip, much rather than something fancy. He wanted to show her the world, and also, all those nice private places all over. All of them.
Where did they first meet:
I'm no fun and stay with canon.
After learning about his nature, Letha thought it was funny to bring a puppy. He was afraid he might eat it. They still have it. She named it Daisy. For whatever reason.
Everything. Literally everything. Mostly not really seriously, nothing that isn't forgotten the next morning. The thing that sets her up the most is him getting himself (and Roman) into danger, and he gets angry with her when she gets too close near the full moon because he's afraid of hurting her.
Do they go on vacations, if so where:
Wherever the car takes them, and however far they get with what's in the tank.