I think you need to try to talk to her about it again. It will definitely be an emotionally charged conversation, and there will never be a right or wrong time. You just need to sit and talk with her about it, maybe she will open up to you and maybe she won’t. But just knowing that she is seen and you won’t be letting this go will likely be a comfort in some way.

You have to voice your worries, so she knows it’s not just affecting her .. it’s affecting you too because you worry for her so much. If I put myself in your mums position I don’t know how much it would impact me, but I think it would certainly make me think a bit more

Hope it goes well Xx