wannabe. I think you've addressed your own question, really - if the DCs are told by their mum that it's not "right" that they are looked after by their stepmum, then even if their dad says it is ok, is it really the right thing for the DCs?
I remember being told here on these pages years ago, not long after I became a stepmum, that I should respect my DHs ex's wishes for her DCs even if my DH disagreed.
While I don't do it for those reasons - my DHs ex has done nothing to deserve my respect - I now do go along with what she demands, as it is easier on the DCs when I do.
That has meant refusing, on occasion to look after the DCs when DHs has asked me, and involved him dragging them somewhere they really didn't have to be. But, from experience, I know that is the least worse option for them.
In an ideal world, all stepmums would have natural, positive relationships with their DSC. That would include spending One on one time together. However, insisting on that when it is not welcomed can be more damaging than its absence.
A few months ago spent several hours in the company of my DHs DS, on three consequence days, after not seeing him for over three years. We spoke no more than a few words to each other. I got to know the teen boy that accompanied him better than I became reacquainted with DHsDS. I've not seen him since.
I'm sure to many people, that kind of dismissive and casual attitude towards him on my part is unforgivable. If I'd posted here for support at the time to help process the hurt I was feeling, I'd have been told I was dreadful for not making every effort to make him feel welcome. Told I should have tried harder. Told it was my job to be the grown up.
But, I know that the least worse option for him is that he has nothing to do with me.
I am confident in my own decisions and position as a former stepmum. I didn't secure that thorough this forum and I urge anyone who needs that to seek professional support to garner the strength you need to be a stepmum.
This forum is a way of self reflecting, but cannot provide the support needed to overcome most hurdles in a stepmums life.