I don't think it's too vulnerable. When did you send it, and when did she start her maternity leave? If she just had a baby (or is preparing to have one, like if she's due soon), she likely doesn't have that much time to read and reply to emails, so if she's going to respond (and I'd hope she'd at least acknowledge receipt in some way), it may take her some time. I don't think it's anything personal, but just lots of life stuff going on right now. Also, if she has a separate work email address, it's possible she's taking a break from checking it for a bit, so she may not have even read it yet.

You did say she didn't need to respond, and I know some T's will take that at face value (mine likely would, for example--so I know if I want some sort of response, even just acknowledgment of receipt, I shouldn't say that). I'm saying that in case she is the sort who would think "OK, she's just updating me and said I don't have to respond, so I'll take her at her word."

I'm sorry this is so difficult for you--I'm sure it would be for me as well. Hugs, if wanted.