Do I have the right to be offended about what my MIL said ?

Hello all,

I’m a 23 year old female. Recently, my mother in law sent my husband a message saying she wanted to take me shopping for Christmas because she finds my clothes to revealing. I wear a size 40DDD so my breast make everything look worse. However, I’m offended because who is she to comment on what I like to wear? Or am I thinking too much on it and should accept her gift ?