What would you say to someone in palliative care?

Apparently husband's aunt is in palliative care and he wants us to send a message to her via video because we can't visit her. Her and I were not really close. We had a falling out when she criticised me a lot when she was visiting us with my MIL when my girls were still babies, but for the past year we're sort of okay. I just have no idea what to say. Please help.