My sister lives on her own and will be spending most of the Christmas season at my mum's. As a result, she can't be bothered with the hassle of getting decorations out of storage, putting them up and then taking them down and packing them up again.
My mum was a bit shocked when she heard this and keeps saying to me 'imagine she can't even be bothered to put up a few decorations'.
AIBU to think that my sis is quite right and I'd probably do the same in her situation. (In fact one year I did actually put my decorations up after Christmas day because I had been away for the days around Christmas but was having some friends for dinner on the 30th
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She will be surrounded by lovely decorations at my mum's including lots of stuff we've had since we were kids, so it's not as if she's spending Christmas sitting in a bare and unfestive house with ne'er a fairy light!