God OP, I really get you.
I had a baby 9 weeks ago and honestly since he arrived my feelings towards my DSC changed so drastically. Everything got harder work and I am so protective that I am going to be honest in saying I am just a ball of anxiety when they’re around.
I’m also completely with you on the MIL, she treats the DSC completely different to the baby, and it does cause a lot of strain. I know he’s only a baby but It is blaringly obvious, and no doubt will affect my DS when he’s old enough to see for himself.
I am looking into counselling, purely to find the root cause of these awful resentment feelings and to hopefully find a way to cope and manage these feelings, as it really isn’t worth splitting another child’s family up, or your relationship.
I don’t have much advice as I’m dealing with it myself, please ignore people harping on about how they’re finding it hard to not judge you and that he’s an innocent child or that you have post natal depression etc. I explained all my feelings to my doctor last week and she said they are not only completely normal, expected and common, she also added that nobody understands until they become a step parent. Nobody at all. She herself is one and agreed with me on many points.
Being a step parent is so much harder than a parent in so many ways. Especially when things aren’t amicable on the ex front. My DP’s ex made life unbearable for us for years, and even now ‘tries’, that will no doubt cause some of these feelings towards your SS.
Please don’t be kicked whilst you’re down with these replies, I can’t believe some people with no clue are saying horrible things above. It’s like commenting on veganism if you eat meat. Everyone’s entitled to an opinion and you have wrote a post on mumsnet I suppose, but this is exactly why I didn’t bother.
You have acknowledged these feelings aren’t ‘right’, just like me. You have asked for help and you would like things to change.
All those things are exactly why you ARE NOT a bad person. Like pp said, it is an absolute instinct to protect your own, I’ve never known anything like it. And unfortunately SS isn’t your own, and it baffles me how people are so quick to remind you you MUST treat him as equal, you MUST cater to all his needs and put them before your own and the needs of your child, however will be as quick to remind you he is NOT your son, it is ‘nothing’ to do with you, and to tell you to keep your nose out etc.
Concentrate on you and your son and your relationship, and the rest will follow. I will private message you but in case you don’t see, I really hope you find some help and things get abit better. I’m really glad I’m not the only one (even though my doctor reassured me there are thousands of people that feel this way from time and time, and it is normal in the circumstances) xx