cant believe my husband

so my best friend and her bf broke up after 3 years. she gets evicted and i give her plave to stay because we have an extra bedroom. im on probation for a drunk incodent. i am in AA and have been clean for 3 months. my best friend smokes pot but outside not in the house. (it doesnt bother me cuz i dont care for it) my husband and i get into an argument because she has a guy stay the night. (she pays rent) so he calls my probation officer the next day and tells her she smokes pot. he never told me and i had a home visit from her today and she tells me he called her last week. would you be pissed or am i just over reacting?