Aibu to tell my sister to suck it up

[Vodkajellies]

I've booked a trip to Disneyland for dcs birthday originally it was just going to be myself and dcs my sil asked if she could come so we booked everything and it was all paid up and my dsis asked if she could come but as the room was full she had to pay a reduced price for an extra room all was fine until exdp said he'd really love to join us after the last few months it would be a turning point
for us,I've given him the price of adding himself on and told my dsis about she is now refusing to go as she doesn't like exdp (neither do I but its besides the point) anyway she said he can buy her tickets which are almost twice as much as what I've told him he has to pay and I know if I tell him it's more it will cause an argument and he will probably end up not coming.
So would I bu to tell dsis it's tough I've given ex the price he has given me the money or tell ex he has to pay to more? U know their his dcs and he's a shit but he's not rolling in it.

oh so sorry yes you ABU.

YABcompletelyU, I cannot believe anyone would actually think this is ok.

Awful idea to go on holiday with your ex, sends odd messages to the DCs and completely out of order on your DSIS. You should have asked her first.

Why post on AIBU when you have already decided you are being reasonable. One of the most one-sided AIBUs i have seen recently.

I can't stand my brother's ex wife (the mother of his kids.) They split over 10 years back, fortunately I've not had any contact with her since, though see my niece and nephew regularly.

To be polite, I ask after her when speaking to the kids (though TBH I'm not really that interested in her, just in the kids' welfare.) If I happened to see her on the street (unlikely, we live about 50 miles apart) I'd be civil to her if the kids were with her, otherwise, I'd probably blank her. I certainly wouldn't go on holiday with her.

I'm not sure how you ever thought this would end well. You make plans to have a holiday with your dcs and along the way, your sil and dsis are included in the trip. Costs are agreed, bookings are made. End of. Or should have been.

Except that you now introduce the Spectre of the Feast in the shape of your ex partner. A man that neither you nor your dsis like! So it is hardly surprising that she decides not to come along and expects him to pay for the cost of the trip that has now entirely changed and not for the better.

Long before telling your ex-p that he could come along you should have cleared this with everyone else. Not just booked him onto the trip and expected your dsis to put up with his unwelcome company and worse, be out of pocket on the basis of you messing around with the arrangements.

After reading some of the OP's other threads, its obviously OP wants him back, only 2 months ago she called him, the love of her life and she was on the verge of being his other woman.

Sadly, its gonna be the kids that suffer.

Oh op, I've just read your 'help me' thread :(

This is not a good idea, not at all.

I give up.

Hope your trip of a lifetime isn't too much of a nightmare and that your sister forgives you eventually.