Can I maim a family member?

Km

So I'm not pregnant yet, our whole family thinks that we are not able to have children, (I underwent a minor surgery to fix that, so we are ttc.)

And I mentioned to my SIL that if we were able to have kids I wouldn't be able to have a vaginal birth.

She (being the recent mother of one, 2 weeks old) said, and I quote the message,

"If you have a C-section no one should even show up. It's not like you did any work so you don't deserve a celebration."

Can I maim her? Please?