Raspberry - I think I can see where you are coming from.
It's not the fact that your sister wants another baby, it's the way her casual comments are making it seem so easy when you know it's not always like that.
I lost two babies in second tri before I had my son, our first son was stillborn and our daughter was premature and died shortly after her birth. At times I struggled to understand how something that happened so easily for other people involved so much pain and grief for me.
I always tried not to show it, but sometimes it was easy for me to listen to pregnancy talk and sometimes it was anything but easy. When BIL and SIL kept their fourth pregnancy from me I was very upset though.
And when I was using the baby loss support forum on another site this same issue kept cropping up, why is it so easy for other people, why don't some of them realise how lucky they are, why is it so hard for me to be happy for her?
I would love another baby but we have made the decision not to try and I think it's the right one. We absolutely could not cope with another loss. We lost both our babies in the space of eleven months and when our daughter died I was so ill that I almost died too. My third pregnancy was complicated, I had to have a lot of medical intervention to ensure my son was not at risk of premature birth and we still had the unexplained stillbirth risk hanging over us so there were no guarantees. Labour was long and complicated and it took me a long time to recover and it stirred up a lot of memories and grief.
But sometimes I still do think "but what if..." and wish it was as easy for us as it seems to be for a lot of people.
And I don't think you are wrong to find it hard to listen to your sister making plans as though having a second baby is the easiest thing in the world to do. You would be wrong to treat her badly because of it, but it doesn't sound like you are doing that to me.
lelainapierce - you have no idea what you are talking about, there is nothing to suggest the OP left anything late through choice. IVF can be a long battle that starts at a young age. You owe the OP an apology.