I think it's reasonable to assume she didn't see your message, for whatever reason; so, she can't respond.

Have you talked to her about your thoughts about her and what she's doing? Have you talked with her about what it's like to imagine her tucking her kids into bed, and maybe wishing you were one of them, being cared about with tenderness, and feeling so safe. There is nothing wrong with these thoughts. Let them come and just see what they are about for you. Notice without judging.