Long story short..... DD has a core group of 3 friends since Nursery, parties have always included this same gang & since starting School added 3 others, as she's got older the parties have got smaller - as they do, so its ended up being this group of close friends only........that was until earlier this year when 1 of these friends (I'll call her X for ease) had a small birthday treat day out & invited all the others - bar DD :( - we were shocked too, as we've always got on well with Xs parents too, not best friends or anything, but liked them & they seemed to like us - I was even offering to help out with childcare when they split up & this was taken up & we had X here at short notice etc
DD was naturally upset, but handled it with a lot of dignity - that was until X then started to rub her nose in it at School - kept telling her if someone pulled out then she would get an invite next - if i do as I tell you, then I'll ask if you can come too etc etc -one DC did drop out & X then invited another DC new to the School - DD was heartbroken- lots of School spats, Dd being excluded from the group of friends as X was using her party invites to control the others, so I had a word with the Teacher as was worried DD might eventually blow up on her "friend" - Teacher was equally as shocked & sad for my DD, but said it explained a lot & would keep an eye on the situation - etc etc - anyway Party was over & done with, we took DD on a better day out to try & console her - which worked & things have calmed down at School, though the friendship is naturally soured, DD has been very grown up about it, though not sure how she'll play it at her own Birthday yet, but at this age (9) I will support her in whatever her choice is.
Roll forward to this morning & I've just had a phone call from Xs Dad - asking me for the phone number of another of the group of friends, as X wants to invite her out, he says lost all his numbers 
- never mentions X & DD meeting up at all - just wants a phone number to invite others- I was probably a bit childish 
& didn't give it to him as I was a bit 
he would have the cheek to ask me & also DD took the call & I saw how excited she was - obviously expecting an invite herself :(
Am I being unreasonable to think in the circumstances this is just plain bloody cheeky if not a bit cruel 