It may take some time to feel connected to her again as she has been out for so long.

From her reactions, I believe she will be receptive to your feelings, whatever they are. So, by all means, keep talking to her about not accepting her apology etc.

I also don't think she will hold it against you for not sending her a "get well" card. There is no expectation for clients to send anything yet, it may lead to productive discussion.