In trouble for making fun of sisters!?

im 19 year old boy i got into trouble today for making fun of my sister sin there ballet costumes, my mom was so mad, i kinda accidentally riped one of them, and she got so pissed off, and is making me wear one of my sisters ballet costumes to there ballet cl, and she might make me take cles, im so embarred, she has a pink leotard white tights and pink slippers laying on my bed and expect me to put these on, do i deserve this? is it fair?