There are a few things going on here, and they are being terribly conflated.
Does the OP have a ‘right’ to feel embarrassed by a situation she finds personally distasteful and politically offensive? Of course she does. People have wildly varying sentiments about private schooling, and this would be an inflammatory topic no matter where it came up on MN – but for people who are against private school, this can be comparable to, say, having a stepchild who is an active member of UKIP. Point 1 – the OP doesn’t have to justify her feelings on the topic. She has views and beliefs and is permitted to hold those and yes, to disapprove of others’ views and beliefs, as we all do.
What can she do about that disapproval? This seems to me a much more valid question, and all the debate about the rights and wrongs of private schooling is really completely irrelevant. Of course she should be kind. But she doesn’t have to be a puppet.
Is she allowed to openly challenge her DSD’s comments about school? I think that she is, actually, given the age of the child, and with the proviso that this needs to be done in a thoughtful and considered manner. If a teen wishes to engage in adult conversation, and learn how to conduct adult conversations, she needs to accept along with that the idea that her ideas can be challenged. My own DSD is arriving very late at this realisation. When she was a pre-teen and young teen, she was encouraged to take part in adult conversations, but this was a very one-sided thing, as the adult response was limited to noises of encouragement and ideas were seldom challenged. Even when she expressed, as kids will do, rather flawed thinking about issues of race or even made factual errors, these were overlooked. I’ve lately decided that I will no longer take this tactic, but will treat her more as I would any other person with whom I was having a conversation. If I hear a snobbish, classist or ill-informed comment from another family member or close friend, I am likely to question it, if in a mild and carefully phrased way – why then would I not do so with the children who I am a co-parent to?
My DSC attend(ed) a secondary school with a very homogenous population of white, upper-middle-class, children. To give you an idea, the popular school trip is a skiing holiday abroad with a 4-figure price tag. The kids regularly came home with rather bizarre (and completely counter to our own circumstances) ideas about how normal people live. After a discussion about changing our broadband services in which I was told that “only homeless people don’t have high-speed internet”, I was in a bit of despair, frankly. Other nuggets which have come up – informed directly by something that was said at school - include the idea that gay people are now privileged in society, that racism is over because America has a black president, and that unions are “against God”. Oh, and that we should – seriously - move house because our street was not posh enough. If the kids are old enough to feel they are informed enough on these topics to have adult discussions about them, then by god, let’s have an adult discussion. Not pat them on the head because their self-esteem might suffer from having stupid ideas challenged.
How can anything legal be 'inherently wrong'? That is just nonsense.
Right...so everything legal is morally right? Something can't be both legal and very very wrong? That's...an interesting claim. (But let's keep that in mind when the "were you the OW?" question next pops up, shall we?)
Sorry -tough. It is DHs money and his responsibility to his child and whatever is left over is for you both to do what you like with. You knew he had kids when you got together.
This, of course, is just total and utter poppycock. The DH has equal responsibility to all the members of his family. The OP and her family are not to be content with the “left overs”. What a repulsive attitude. You’d have children raised on “whatever is left over”. When people come out with utter shit like this, I really wonder how they look at themselves in the mirror.
In fact, as in every family, if circumstances change, cloth gets cut anew.
Just as sensible, by the way, to say “You knew he might leave you and have other children when you got together.”