Have they taken any trips together that they really enjoyed ? Like if they went to the mountains, you could put mountains in a square, if they like a sports team, maybe a logo ? I think I would save the stork for another quilt. Maybe a square for her , stars or moon, his cricket , the wedding date, and then joint interests. As the two become one kind of thing ? And if you can ta pic of the two in the center .
GOOD LUCK& keep us posted