Aside from it being difficult to hand raise wild rabbits, it's best not to bring them in the house if she has other pets. Wild animals can carry all kinds of illnesses or worms that they may be relatively immune to, but would wreak havoc on our domestic animals. That may be something good to let her know of for the future.
Also, wild rabbits never become "unwild." Their instincts are much different than our domestic rabbits. They are likely to injure themselves in confinement, potentially fatally. If they do survive until she feels it's okay to release, there is also the risk of them being too wild (nervous/skittish/afraid) to be kept domestically, but too domestic to survive in the wild. Usually that means something will catch it within days.
Generally speaking, by the time we find wild rabbits out and about, they are ready to be on their own. The exception may be if you mowed over a nest of babies with their eyes still closed. At that time, a wildlife rehabber is the best option. But once their eyes are open, they're often leaving the nest on their own.