I should have made it more clear, my DS and the baby I'm pregnant with, don't have the same father - so my DS's last name will be different to this baby's no matter what.
I wouldn't consider the option of this bub having DS's surname.
Thanks for the feedback though, I appreciate it everyone.
I seperated with DSs father before he was born and he has my maiden name, when I married my DH I asked if he wanted to change his name but he said he likes having the same last name as his Pop Pop
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