@Krister I think the joke is that she saw the summer shirt, then thought that her daughter would like to see her wolf form in summer clothing (let's remember that the daughter still doesn't know that the wolf is her mom) She went and shaved the fur in the shape of the shirt, but the girl as not amused
@Doctor_Malsyn She's shaving herself to match the style of clothing she likes so she doesn't have to buy it to "wear" it. Daughter isn't sure what to make of it at the end.