Sure it will make a difference to some. Do you want to work for people who judge that way?
Most people realize a woman's last name may be her husband's.
I would worry more if the name sounded Muslim, and even then, a worthy employer should know there are plenty of decent muslims.
Taking a...
Apologize to your sister for taking the liberty of telling her when Mom may have done it in a way that worked better for her.
Then assure her that the most important thing when it comes to sex, is love. A better term would be lovemaking.
She needn't and shouldn't EVER do what she is...