Boi . Evan is less of a real person than I am . <| sep |> I ' m sorry this happened to you . Is it safe to assume that your parents are over 60 ? I have personally found that a lot of older people don ' t understandbuy into food intolerances . I think this is because food was different when they were younger . You could trust it more . Now we live in a time where everyone can ' t have something and I think some people get tired of it because they aren ' t personally effected . The fact that your mom knows , but bought the cake , I find strange . Maybe she thinks it ' s not that bad . Like someone else said , parents aren ' t perfect . For us , we have a child that was born severely allergic , and another that truly is intolerant of certain foods . They both see things differently . The one that ' s intolerant would happily eat food that he shouldn ' t . The other wouldn ' t touch it with a ten foot pole . He ' s actually genuinely afraid because he ' s also contact allergic . It boils down to frame of mind . They raised you for years and you ate the food , so what ' s the big deal ? A slice if cake won ' t kill him . Unfortunately , that ' s just how some people think . Rather than be upset , try to be happy that they thought of you and wanted to celebrate with you , even if it wasn ' t super considerate of you . Again , sorry that this happened . And Happy Birthday ! !! Also , there are a ton of GF vegan options you and your sister can enjoy together .