Personally, I've chosen deliberately to make Eileen stronger than she appears in Snape's one memory... It's just one example. I have Tobias with an abusive streak, but Eileen will fight back verbally (and in a few cases physically or magically, to protect Severus and herself). Were I to write her like that (I didn't include that in my earlier post; I should have, though) how can you see her and Severus' relationship?