i think it's better not to work for female bosses. because they will think that if they have gone through it, so can you.
hence this can explain why your boss with kids start complaining. probably because she went through it and was still able to tahan and go to work and she thinks everyone else can and not being able to do so is an excuse.
hope you are well!!! dont't worry, just countdown first trimester. it will be over soon.