Is this normal to hate this?

Ok for the past few weeks its has been hot and I am 21 years old and I am still living with my mother and I can't afford to mov e out and I know that the weather is changing now but I really get annoyed when I see my little 15 year old brother and my 40 year old mother walking bare foot I don't know why but I really hate it when I see people in my house walking bare foot and I know that its not my house because my mother pays all the bills in the house but is this normal for me not to like seeing other people walkin bare foot or not