I answered in projects but just in case you are only checking here, this is my advice:
If you have experience working with satin and you can get some in time to finish the blanket, I would back it with satin. You could still use thin batting or a piece of flannel in the middle. The satin seems cooler in the summer and babies love how satin feels.
It is very cute. If you feel your daughter might think it too heavy, you could send a matching single layer of (satin trimmed) fleece. Let us know how it turns out.
Thank you! I am nervous about satin (have no experience with it) but I do realise it would have been nice - will keep that in mind for next time.
Your quilt is just beautiful! Someone will be very lucky to receive it!
Thank you, but my daughter's instructions was "just a receiving blanket" and now I am wondering if it will not be too thick for the new born in the beginning of summer!