J.:
It seems to me that there are hard feelings because you are pregnant and your sister-n-law is not and hasn't been able to successfully have a baby. There seems to be tension due to the miscarriages and her not wanting to face the feelings that she needs to.
My thought is to pray about it and really work hard at knowing that even if she is resistant to you right now, in time, it will all work itself out. She seems frustrated at the fact that you are having a little one and she doesn't yet.
I would gently offer her advice on how you and your husband did not tell anyone that you were expecting until well into the pregnancy. Let her know that she is loved and will soon have a baby if they keep trying. Tell her however they need to work on getting rid of those horrid feelings of the loss of their children from the past. This way, they can go into a new situation of having a new baby with great feelings of love and caring and not be so scared to death that THIS baby will miscarry. Stress could be a factor in the miscarriages. Your sister seems extremely busy and maybe a little stress relief would be a great way to get her and her husband back on track to having kids again.
I know it's the holidays and many people just want to stay at home, but maybe the 2 of them should be spontaneous and go for a vacation away to some tropical place and enjoy each other while they heal together. I know that my husband and I did not see eye to eye and I did not even want my husband to touch me after I miscarried. It's hard on the person who carries the baby and the husband.
Let her know that she needs to rekindle with her husband and talk with him about the situation and maybe lay off of the topic as far as getting pregnant again until they are emotionally ready.
Also, offer to your brother that your sister-in-law needs a spa day and have him give them spa day gifts together. This will also help reconnect the marriage and the healing process will begin.
I'm sure this is an emotional roller-coaster for the whole family as I know it was after we miscarried. Just try to give her space and let your brother take care of her at this time. Offer suggestions to him on how he can help her cope-and things that will help them both cope.
As for you confronting her, don't. Just tell her that you love her and that her time will come when it is the right time. Let her know that you still need her help with your kids and that the wait for another child will definitely pay off in the long run because she is a great Aunt and she will be a great mom when that time is right.
I hope this helps. I'm sort of a rambler, but understand both sides of the issue.
Hope all works out and keep me posted.
Kim B.