It was my son’s week to be at his mom’s house. While he was there he was playing with Fire works, caught the house on fire and did $36k of damage. My ex wants me to cover half. The rest of the story is I caught him at my place a month earlier playing with smoke bombs. I took it all away and had a long talk with him. Only question is, am i legally responsible? It was an ugly divorce so there is no working with her.