What surname have you or are you going to give your baby? Yours, your partners? Both?
I think I want the kids to have DPs surname as it's nicer (IMO) than mine, but I want to have the same as them! If we hyphenated it'd be too long, but would it be weird if hyphenated my surname to include hers?
Then she and the kids would just be A--------- but I'd have the A surname as well as my own.