I think the article is pretty complex when it comes to the relationship between the author and Eudocia, and what he could have done realistically. It seems relatively clear from the piece that the author grew up in a fucked up household, with possibly emotionally abusive parents, and Eudocia was likely the closest thing he had to a mother; similarly, the author and his siblings are likely the closest thing Eudocia has to children, and grandchildren.
It's pretty easy to sit on a high horse, and talk about how you definitely would have done the right thing, but fucked up shit like this is happening all around us, we just don't see it. There are people suffering right now, all around you - and yet, is it so easy to go up to them, even just one of them, and lift them out of the situation? If you knew the author and Eudocia personally, what would you have done? Report her to the authorities? In the 70s? The 80s? The 90s? The police probably wouldn't treat an undocumented immigrant who has a shaky command of English very well back then. Would it be something she wants? Would it be better for her? Is there a path to freedom that will give the now-liberated person the resources they need to survive and thrive? I don't feel like there are obvious solutions in our fucked up culture. The author absolutely could have done more, and he is definitely complicit in slavery. Still, I can recognize that the path to Eudocia's freedom is not as easy as people make it out to be.
And that's the insidious thing about it. If there are people being kept as slaves around us, what can we do to help them? How can we stop these social practices that exploit these people and steal their lives? If we know that someone is being kept as a slave, how can we help them from the situation, while according proper respect for what they want? This is something that's all around us in different forms, but it's so ingrained in our society and supply chains. How do we free slaves?