My feelings exactly, swallowedAfly.
As the term 'step' is also not viewed in a positive light, then dad's wife etc should surely cover all eventualities? It is vague enough to spell out the situation and also vague enough for each family to have their own, private interpretation of what that means. I have a woman friend who really struggled to 'love' her husband's son (15yo), felt a lot of pressure to be a 'stepmother' to him and was mightily relieved that she didn't necessarily have to. Each new family carves out whatever suits that family. A lot of children aren't eg interested in their parent's new OH, not really, but know that their parent comes with a package ie a new partner. Love may grow but then again it may not, as long as everyone is decent - and tbh children seem to have more of a handle on being decent in situations like this than the adults.
This struck a chord: "She also seems to be hell bent on creating an 'ideal family'. I'm sure that this must be a temptation for second wives. So they can sort of trump the first failed marriage/relationship." Definitely the scenario with ex's wife unfortunately. I also "... truly hoped he would meet a warm loving caring partner but it seems he's met a rather bossy control freak" 
NotaDisneyMum Tue 12-Jul-11 20:59:30
"OP - I assume that your exH wife is as unwelcome at his DPs school events as I am at DSS's"
I can see where the wife is coming from there Disney, sorry . It depends what has gone down before tbh. There's no point thinking we're all a happy bunch if we aren't iyswim. In my case, ex's wife applied for parental responsibility at ds's school, without my knowledge or consent. She also gave me a lecture after asking me a direct q about ds's schoolwork to which I fudged the answer (all the while going
inside at the cheek of the woman), to which she demanded I immediately get ds's school records to check something or other. I responded with aplomb, as ds was within earshot.
This idea that, as someone posted, the first wife can't accept that the ex has moved on and has a new life - no, that's not it (though I'm sure some women feel like this in their heart of hearts, particularly if she was abandoned for someone else, which takes a lot of getting used to, takes time). It's when the ex's wife is presumptuous, takes on a role without waiting to be invited (if you like); jumps in feet first. It's all a bit much.