When this woman feels offended by her SIL, she asks Reddit:
My brother’s getting married and asked if my twins (17f&m) could perform something.
My daughter’s in choir and son’s in a band so they’re both musically talented and they love their uncle to bits so they were over the moon and began planning something immediately.
Well a couple days ago I got a phone call from my future SIL. She was talking about how she wants her wedding to be perfect and have a very “delicate” vibe. In other words, “pure” and “angelic”.
Then she made a joke about how opposite my twins are. I laughed along because I really did not understand what she was implying.
She finally got to the point though and asked if my daughter could just do a solo instead of having my son join.