My sister won’t share a potential refund on a holiday

Personally I would prefer the single.

Did the 3 of you decide who would have the single cabin, or did she nab it?

Imo the cost of the cruise should be totalled and divided equally.

Me!

Who paid the cruise company for the holiday?

I am assuming the cruise company are not charging you for the single room.

You presumably had sight of the cabin dimensions and layout before you booked. If the company provided what you had booked, they had no obligation to offer the additional room.

I am assuming you shared equally the cost of the triple room.

You and your friend ended up with more shared space and natural light. Your sister had her own space but no natural light.

I doubt the company will make a refund but were they to, it should be shared.

I also don't think you are entitled to a refund.. If she successfully wins a refund.. it should be hers.. If you feel that she abuses your hospitality that is a different issue..

If your sister's request is successful it will be because the tour operator agrees that she's entitled to one because she stayed in an inferior cabin, so I don't understand why you think she should share it.

Your sister may not ask for, or get any refund so all this stress n your part may be all be unnecessary
As for Christmas visits don’t invite her if you don’t want her to come and finally being in a windowless cabin would be my worst nightmare.

I’d keep it too if I’d expected an outside cabin and had to move to an inside one. You or your friend could have done that.

I don’t understand the maths the tour operators use for calculating the cabin prices - but you’re probably right. we were originally charged a rate per person for a cabin to sleep 3 which had portholes - so more expensive than the single cabin. I’ve no issue with how the tour company dealt with the matter, my problem is with my sister’s attitude that she alone is due a refund. It’s made me see another side to her and I don’t like it.

Well you said you had a lovely holiday so why worry about the logistics You haven’t lost any money have you ?
I suppose she’s basing the refund on the fact that she was in a inferior cabin (inside with no window would freak me out)

First why would there be a refund ? and if there is maybe she should get it as she had had the inferior cabin and you had more room for you and your friend in the better cabin ! Or have I misunderstood things
But I agree with Vera why would they give you a refund when you ended up with more room for all of you

If you ended up with two cabins instead of the original one you'd booked, I can't see where any refund is due?
Wouldn't the two cabins have cost more than the one if you'd booked both to start with?