My daughter will be celebrating her birthday with a slumber party this year. There will be six in total. Her two closest friends will be able to enjoy the celebrations, but not sleepover due to religious/cultural differences. Two other friends had a fall out back in July and look to have no intention of making up. Which leaves the final girl who is a twin. My daughter does not want to invite her twin sister as they are not very close. The problem being the mum is likely to take offence, not to mention the uninvited twin being hurt. Please could somebody advise their next move forward??