I've emailed my friend (she lives 150miles away) and mentioned possibly incorporating the same fabric in the quilt, in the borders, or the backing, etc. She thinks that's a good idea..
But I'm telling you, there's just no guessing how her son and DIL will react, even if the same fabric is used.
I've seen them dislike something because "now there's just too much of it in the room". AAGGGHHHH.
I agree with the ones here who've said not to make anything, just buy something but I know making a baby quilt is really important to her. So I'll help her on the weekends.
Thank you all for your input.
And cross your fingers. :D