Well done on your honesty firstly, it's hard to admit your own wrong-doings. Maybe put yourself in her situation and picture her the one who made an emotional connection with someone else and persued this for a few weeks. What would you need from her to feel safe again? How would you feel? She is more than likely feeling very self-conscious now, like she isn't good enough. Maybe start with this, compliment her, let her know why you chose her and what you love most about her. Don't mention the children, this is probably not what she needs right now, she needs to feel wanted regardless of being a mother. Hope this helps.