Your question cannot be answered since Peter is not married to a man named Louis.
Please rephrase your question so it can be answered properly.
There is no such episode seeing that there is no character on Family Guy named Louis.
Your question cannot be answered as there is no character of Louis on Family Guy.
the episode when peter and Louis get Chris and Meg a boyfriend/girlfriend
Season 2|Episode 13 Road to Rhode Island
Season Three's Stuck Together Torn Apart
Peter Kay was in the episode Love & Monsters.
There aren't many but ...GiggityWhat the deuce?Who's leg do you have to hump to get a dry martini
Just dance cona be OK
Mia dumps Peter in the first episode of season 9
Season 2|Episode 8 I Am Peter, Hear Me Roar
Peter, Peter, Caviar Eater
Peter and Lois Griffin got married in the episode titled "Death has a Shadow," which is the 1st episode of the first season of Family Guy. Their wedding took place before the events of the series, but specific details about the date are not provided within the show. The series mainly focuses on their life and family after their marriage.