Introducing New People
Don't introduce everyone to your kids. Children can form attachments, relatively quickly, to new people and you do not want them to get accustomed to having someone in their lives, if there's a chance that person could potentially leave. Wait a few months, into the relationship, before you introduce them to your kids. Also, allow the introduction to be on your children's terms - try a casual lunch at home or game night because your children will feel more at ease in their own surroundings.