3year old boss

Ok so my three year old daughter is awesome for the most part. But lately she has been acting up. She will not listen to her dad, my husband for the life of her. Whatever he says to her is of no effect to her whatsoever. She undermines him in every way. I always tell her she has to listen to me and her dad but she always says no only mama. Like it’s a true nightmare when I need help to do simple things and she jst won’t listen to him. Any advice on this!?