I'm thinking of selling a christmas gift given to me by my mum
Why would you want to sell it?
I think the gift is very ugly. It reminds me of my mother every time I look at it
If you're worried about upsetting her, stash it away when she's not over and bring it out when she comes by.
But it is destroying my home's decor.
You could try and give it back to her if you'd prefer to be honest.