I know it's different from the description you gave me, but come on, this is Lyra Heartstrings. Just have her lay around is not her, but I did added the harp. I've spent quite a while on this, and I hope you enjoy it, at least.
Lyra playing a little for her kids, then they start kicking, and she enjoys it. She bears twins.
Updated: As many point out the anatomy is wrong, I went ahead and fix the problem.