It really saddens me that we as a nation are so disattached from the food we eat. Does she have any idea how commercial beef, pork, and chicken is raised? Meat doesn't just magically appear on styrofoam and wrapped in plastic. Your roosters have had a wonderful life compared to that chicken sandwhich she had yesterday. Despite your inexperience they'll also likely have a more humane end as well.
Chicks hatch naturally with a 50/50 male/female ratio. If kept at that ratio as adults the hens will literally be raped to death. So what is her solution to this problem? Put the extra roosters in a cage for the rest of their lives? Not only is that a miserable existance, but who's going to pay for all that feed?
I think you're being very generous by not requiring her to participate. You want to know what I and my family did on my 16th birthday? We butchered roosters, 16 of the biggest meanest ones. It was the first time I had participated in butchering and the first any of us had butchered any chickens. Because it was my birthday I got the "easy job," plucker. I knew from day one that the cute fuzzy little male chicks we were raising were destined for the freezer and as an animal lover I really struggled with that. But then they "came of age" and started tormenting my hens and pullets, keeping them all "tree-ed" most of the day, so that they didn't get much to eat or drink and certainly weren't laying. I figured out for myself that there really wasn't any other practical answer but to butcher them. It wasn't going to be fun, at all, but it had to be done.
Here's what I'd tell her, if it were me. First, you don't understand the meaning of the word torment. If butchered properly, like I'm going to do it, they are not tormented AT ALL. Look up the word. Secondly, I want them all gone in x number of days. You can go ahead and find homes for them if you'd like, but be honest with the people that they're not show quality. Also be aware that those people would of likely otherwise gotten a different rooster, which you now just condemmed to the stew pot. Or, if you'd like, you can find and buy or make some cages. I think that would be a pretty miserable existance for them, but if you want to do that, then that's fine. I don't want to hear them crowing, I'm not going to care for them, you are going to purchase their feed with your own money, and you're also going to compensate me for the feed I've put into them so far, since I'm not going to have any chicken dinners. And if they ever get out and I see them pestering my hens they'll disappear. But if you'd like to do that then fine (assuming this is an okay option to you). I don't know her or what her finances are like, but I'm going to guess that within a few months of caring for them and buying the feed she's going to start liking them less and less.
I don't know if this helps or not, just thought I'd share......