That sounds like a horrible situation and I'm sorry to hear you're going through it.
I think taking it to your T would be a very good solution. You need a safe place to work out what the gift means for you and how you want to deal with it.
It could be that this person is trying to maintain a degree of power over you, but you can't control their actions, only your response to them, and hopefully the place of safety that T offers could help to ensure the abuser isn't able to regain an emotional hold on you.
For now could you put it in an opaque bag out of the way so you don't have to look at it? You could take it to T in the bag so you don't have to look at it at all until you get there (or ever if you don't want to).
Hugs and support whatever you decide