Here is a sticky situation ... if she was still legally married to Mr. Smith when the baby was born, then he is technically the baby's father until - or unless - he can prove otherwise. If the baby was born after the divorce finalized, then the mother can give the baby whatever last name she wants.
When I got married, my husband's ex-wife retained her married name mostly because it was the only name she ever felt comfortable using (her mother also had several marriages and divorces and really messed up her kids names). When the ex-wife remarried she switched to Mrs. New-Husband's Name and the kids retained their same name. Then she divorced husband #2 and went back to using my husband's last name! At that point, I retained MY maiden name even though I was married. I was a working professional with an easy last name and I simply didn't want to go through the hassle of telling my hundreds of customers that my name was now different. When the ex-w got married to husband #3, I was changing jobs so I figured that was a good time for me to make the name switch, too. When the ex-w divorced husband #3 she knew better than to go back to my husband's last name. For years she simply retained hubby #3's name. Last I heard she went back to her maiden name and then had financial troubles and changed her name to another maiden name (from very early in her childhood.)
Another name mess story: My DD's biological mother has had 4 children by four different bio-fathers. Yes, every single child has a different last name. Ugly, huh?
When I got married, my husband's ex-wife retained her married name mostly because it was the only name she ever felt comfortable using (her mother also had several marriages and divorces and really messed up her kids names). When the ex-wife remarried she switched to Mrs. New-Husband's Name and the kids retained their same name. Then she divorced husband #2 and went back to using my husband's last name! At that point, I retained MY maiden name even though I was married. I was a working professional with an easy last name and I simply didn't want to go through the hassle of telling my hundreds of customers that my name was now different. When the ex-w got married to husband #3, I was changing jobs so I figured that was a good time for me to make the name switch, too. When the ex-w divorced husband #3 she knew better than to go back to my husband's last name. For years she simply retained hubby #3's name. Last I heard she went back to her maiden name and then had financial troubles and changed her name to another maiden name (from very early in her childhood.)
Another name mess story: My DD's biological mother has had 4 children by four different bio-fathers. Yes, every single child has a different last name. Ugly, huh?









