Have invited a few friends to dinner on Fri and also invited my SIL (husband's sister) and her two children (cousins to my 13 yr old DD). She texted to say she was working late but would send her 15 and 9 yr old with her new au pair whom I have not yet met. AIBU to not to want to have to look after a young woman who does not speak English too well all night. I just want to relax and talk to my friends. Husband doesn't think it's a problem but I know it will be me who has to make the effort with her and I'm just not in the mood at the mo' - especially as my mother (who has breast cancer) will also be there and I want to concentrate on looking after her.