Yes. It’s like admitting to some personal shame. And, because you’ve admitted to not being one of them (even if you are a parent to your own children 🙄) you are subtly shunned.
Tbf, something similar does happen to you when people find out you’re a single mum. But less so, and there are plenty of other single mums at the school gate too. But a stepmother is just a problem for everyone. Possibly even more so for many of the single mums.
I found that one of the hardest things about being a stepmum was his isolating it is. It’s harder to sustain friendships (as someone said on another thread, and was criticised, of course!) because you have to make sure that every second weekend is centred around the royal visitors. Making your own plans - especially if they involve doing things with your child(ren), your friends and their children - is leaving the SC out and not viewing them as family. But, equally, turning up with two extra children (of an incompatible age to the ones you’d planned around) and then their father might want to tag along changes things and means your friends aren’t likely to want to repeat it.
And then there’s the not being able to talk about all sorts of things because you might sound like an evil SM. So you struggle with so much, but have to put on a big happy family facade. Even with other stepfamilies, there’s an inability to tell the truth. Which actually makes it worse - when your husband starts with X&Y are really happy. Why are you so difficult about this? He’s not seeing any of the issues behind Y’s painted on smile and public performance though.
Even on MN, a SM admitting that life with SC is anything but wonderful and they’re positively delighted to be in their lives is met with a whole mix of blame and vitriol from several different angles at once.
No wonder so many of us were so ‘naive’ in getting into it. There are so many reasons why the truth is hidden and anyone who admits it is ostracised as one of those awful evil SMs. But we would never be one of them. We are nice people. 😩