Just that. Woman I know not married, strong feminist, determined to keep her own name, then gives children his surname.
Why not give her own surname ? In some cultures they do ,they follow the maternal line.
Also, I know it would be less complicated if there are several children to different father's.
Men come and go, but children usually stay with the mum. Would be sensible then if they all have her family name.
What do you think?