I have a feeling the mother would want her precious child to be remembered. But I guess the right thing to do is ask. This is so sad..

OMG that is heartbreaking. I would hold off entirely. No need to guess what someone would want or to ask and cause more pain. I am so sorry for their loss.

Please extend my condolences. I would give the mother time to grieve, then present it to her. You could explain you had started this and wanted to give her some time

I would wait for awhile and then ask her how she feels about it.

My sympathies to the parents and families. I would make something else.

Or maybe embroider it onto a border if it's to be a wall hanging. that way you'd be able to see the statement. but I love the angel wing idea as well. Please give my condolences to the family.

And I think if I were the mother, maybe having something that was intended for the twin that died would give me something to hold when I cry. Even if it were for both, it'd still be something to hold while the living twin was sleeping or something. but I'm not a mother, so I don't know exactly how I would respond

Maybe keep the one you've made for a later date. When her grief is not as fresh and overwhelming you can give it to her then.
Make another quilt for the new baby that she will be bringing home.

honestly, I would make two. give her privitly the one with the twin that passed. It might be hard for her to have people around when you give it to her. And tell her that you wanted to leave it up to her which she would like to have. As some have said, I would want to have the reminder that my baby was here and not just a dream, which it might be how she feels. Plus when the living twin gets older it will be a reminder that their sib is with them always.and I like the dove idea also.

My deepest sympathy to the family and I think the quilt would be most appreciated and i would also add a quilt tag saying in memory of the child also on it . I am sure the family would enjoy the quilt .

This is a good idea... definitely communicate with the mother and family...

a very sweet gesture at a difficult time...

blessings for you and this family...