Eggs are farm-aborted baby chicken foetuses! She's not much of a vegetarian if she eats em too (baby chicken = yolk, placenta/womb = white+shell)
PS: potatoes are potato plant eggs. They're living, they even have tentacles like an octopus if you let em live a bit.
Whatever you eat, you're killing something. It's just easier for humans to relate to animals because they have a face and look more similar to us and operate on the same time-scale (I remember reading an interesting thing on how kittens provoke the paternal/maternal instinct in people because the face is so similar to a baby human's)