A.C.
hi, this might be way out of your ball park, but my husband and i were foster parents that adopted all 3 of our kids. (neither of us can have kids, so that part of our story is not like yours, but,) during our training we were told that the #1 reason people do foster care is to provide companions to their own children. although i don't personally think this is the best reason to go into foster parenting, i do realize that it still does provide a benefit to both parties. a foster child gets a loving home, and your daughter (and you!) get the opportunity to love on someone else.
i agree with the post about 'not just getting pregnant' because DD wants you to, so this could possibly provide you with an opportunity to help someone else while also helping your daughter.
foster parenting IS NOT easy, so i'm not saying it would be this "joyous live in play date". but it is definitely something to consider.
if you have any other questions feel free to ask.
A.
ps my oldest daughter now 5, is always asking me if i ever get to have a baby in my tummy. i tell her that my tummy is 'broken' and that will probably not ever happen, that daddy and i have her and her brother and sister, and it's even more special because we all picked each other. she still gets so sad and i hear her pray all the time that someday God will 'fix' it and put a baby in there. (sweetie) i think sometimes children's desires for babies never really goes away.