It actually would be possible to achieve this from a technical standpoint, but the difficulty of achieving this is dependent on how she accesses Hulu, it also requires someone with a bit programming comfort. If she accesses it from a computer using a browser, this is the best case scenario. In that case, you just have to install a browser extension like Tampermonkey, then you would need to write a script that searches for instances where the title might come up, and hides it/deletes it from the DOM. This can get tricky, but the main browsing carousels, search results, your watchlist and post-video suggestions are the primary places you'd have to remove it, there's probably other detailed places you'd have to find. But each one basically needs a selector to detect the text, and then a way to navigate from that selector up/across the tree to the object you want to hide/remove.

Now if she browses on a phone or tablet or using a locked down app on the PC, it gets harder. In these cases, you would have to intercept the traffic through a proxy server, you can do this at the router level if it's on a wifi you control, if it's not, then you have to set the proxy server settings on the client side (the phone/tablet). Basically you would set up a server to do the same thing as the Tampermonkey script described above, detect whether the traffic is to hulu, detect if the show name appears in the payload and remove the appropriate portion of the payload from the response before sending it to the phone. You would use a technology like nginx to achieve this, and you could make your life a little easier by working with something like njs.

Hopefully this sounds easy enough to you and you can just do it, easier than talking to your wife at least.