What a generous gift you gave. Not just the yarn and the finished product, but I'm sure all your good wishes for mom and baby went in with the yarn. THAT'S what both of them will "see" when admiring your wonderful, warm gift.
So I'm not seeing what there is to be critical of!
Seems to me a maybe slightly larger sock top is FAR outweighed by all those loving, caring thoughts.
Thanks for being so generous!