Had her children ever accidentally found out at near any time in their lives, they may have never been able to trust their mother again - severing what arguably should be one of the strongest bonds one can have.
Would you (rhetorically) find it reasonable that she, or anybody with children, is required to live with that thought in the back of their mind? In an occupation she’s otherwise taken an oath (highly presumably) to devote her allegiance to?
I’m not sure. It definitely seems like a question with a hard answer.