Personally I would gift them to a charity job far from home as it would no doubt offend the mother. Or give them to friends or relatives.

Politely ask her not to buy anymore as she doesn’t wear them.

How old is your daughter? Does she wear skimpy cloths and the mother trying to discourage her daughter in doing so? Not that it means your daughter should change her style, if so it’s probably not a good idea to take your step daughter cloths shopping as that could start all kinds of drama.

It’s really nice of her to think of your daughter when cloths shopping. I am stuck the opposite as my step sons mum won’t buy him a single bloody item of clothing, not even socks lately and he is 10 and growing fast. Every time I buy things for my kids I am expected to buy stuff for him (it’s not spoken by my partner or step son but definitely expected of his mum, she comments on my kids clothing at changeover sometimes and points out her son needs some) it drives me insane as I buy my kids nice and usually brand name cloths and I can’t really afford to buy extra. My kids look after their clothing and it gets handed down to my Neices and nephews. I don’t want step son going without or resenting my kids because he doesn’t get anything although I often try and purchase stuff just after his fortnightly weekend here.

She got half the proceeds of their home after their split and my partner was left with bills. She drinks literally every weekend and is constantly talking about the new 60k car she plans to buy. All this is shit the kids don’t need to know about though. My partners opinion is that his ex gets child support and should buy step sons cloths!

Can’t you take them back to the store to exchange or a credit note

I gave my sons baby clothes to my sister in law and she sold them online if she didn’t want them I would have given them to someone else but it didn't bother me to much

Take her to donate them to the local dv shelter. They will get worn by someone that really needs them and it’s nice for those people to get new items sometimes.
Surely you won’t offend the ex and his partner; How can they quibble with that???? Make sure your daughter tells them what she did with them.

Thanks, I have put most of it in bundles on gumtree.

Also get your daughter to have a 'clothes shopping day' with her (after covid), so she can see her style

I would donate them. Why risk possible drama for a couple bucks.

Unless they're brand name not worth selling, give them to vinnies

I would give away not sell.

Once you give something to someone else, then it becomes theirs to do whatever they want wirhZ. If your daughter is ok with it, sell and buy her new clothes with the $$

Sell them