As crazy as this is, I know EXACTLY how "dreading christmas" feels. I love my husband with my whole heart, and there is no question about it. His daughter was 6 when we started dating and she was the sweetest lil girl. Then, after we had a child together everything changed. She was almost 8, and was extremly jealous of her brother. She also no longer wanted to help do anything, and bossed me around like a slave when she was over (every other weekend, every wednesday, every other holiday,). She treated my son horribly and hurt him on several occasions. Her biological mother HATED us and was filling her head with a lot of crap about us, took away visitation for no reason, and would tell her daughter that her father didn't love her and didn't want to see her. When we would go to court and get visitation back, His daughter would act that much worse towards us and her brothers. When my step daughter was 11 was the breaking point. Myhusband and I had 2 sons together. THEY would cry when she would come over because she was so cruel to them. She would break their toys, push them down, and if they tried to talk to her she would ignore them. I dreaded her coming over because it meant a weekend of fighting and seeing my boys hurt and crying. As a mother, that is the hardest thing, to watch your own children be hurt because of another childs jealousy of them. We had my stepdaughter over for easter 2006. We sat her down and had a long talk, well we talked she rolled her eyes at us and wouldn't say anything, about how she acted at our house. We told her we were going to seek counseling from our pastor the next weekend she was over. We have not seen her since. She emailed my husbnad and said her mom is going to let her go to friends houses on his weekends and she didn't want to come over anymore until he left me and stopped seeing our boys. She then moved to another state with her mother and stepfather (who have no other children), and we have not heard from her since. We were given no number and a false address. She has another brother she has seen once by accident in a store before she moved, and has another one on the way that I am thinking she will probably never see. My huband is very hurt that he has no relationship with his daughter, but it was her that changed, and made everyone, including him, miserable every time she would come over. He of course still loves his daughter, because she is his daughter, but I don't have that feeling. I see her as a bratty 14 yr old that when she wasn't getting all the attention anymore, she tried to tear her father away from people he loved, just to get attention. My boys WILL NOT treat people the way she did and will not be like their half sister when they get older. I am making sure my kids are taught respect, and that they treat their siblings just as they would want to be treated. There is no room for compromising in that area. If you even mention her name to my two older kids they say "atleast she isn't here anymore to hurt us, we hate her". They were never prompted to say that either. That is how they feel. They are now 7 & 5 and are old enough to know what they are saying.
You don't automatically love someone just because your spouse fathered them. A relationship has to be established and kept up. I am sure everyone has had people in their lives that at one time they loved, but after the situation changed and attitudes changed, you no longer feel that way about them. WIth your own child, you have that natural bond, that no matter what you love them, with a step child you do not have that bond. You cannot make yourself love someone that you don't.
I think Prudie was very hard on this stepmom, and unless you have had stepchildren yourself that lived with their other parent, you will have no idea what it is like. If somthing ever happened to my husband, I would NEVER date or remarry someone with kids. My stepdaughter has killed the idea for me that it can ever work out well.