To be honest I don't really consider my sisters step children as part of our family and I would consider using the same names as her what her step children have, so no I don't think it's weird
They are as related to me as any child in the street. They have their own family. What do they care for their step parents family? Nothing.
None of her family will think of your child when they hear the name, they'll think of their own kin.
I just think your SIL feels that family is blood related, which is how I feel. Don't take it personally, because I doubt it means that she likes your kids any less or that they are less welcome - they just aren't family.
If you and you OH divorced, she'd never see your kids again and you wouldn't think to take them around.
As a step child myself, can't just add how sad this made me feel too. We don't choose to come from a broken home, and I tell you what-takes a special person to take on someone else's children and raise them as their own.
I'm 31 and have an amazing step family who've been there for me through the hard times, supported me, my brother and my mum and if it wasn't for them I would not have had the courage or opportunity to go on and build a relationship with my dad. Who by the way walked out on me when I was 6 years old, only to return and break our hearts and do it 10 years later again!
Your opinion is pretty harsh. These are real peoples feelings at the end of the day. Sorry, but hit a nerve there. Monkeynut, I still think its weird!!! But what can you do now. xx