Hard decision to make hun but another thing to consider is that her perception of what it will be like is basically what she has experienced over the last 11 mths with your DS - she has no idea or comprehension of the fun and joy of the next 5,10, 15 years + with her siblings which is what you consider with having a third ITMS? Her idea of another baby is just that - another baby but as we know they are babies for such a short time and will grow up all too quickly. Good luck making your decision! xoxo