I don't think it's a great idea to be honest - it's possible it's also illegal (you'd need to check local laws).
The reason it's not great is because rabbits have evolved over hundreds of years to have the genetic trates that allow them to survive in the wild. Humans have deliberately selected for other purposes e.g. a coat good for clothing, a large rabbit that produces meat for eating, rabbits that are more docile and less reactive to stimulation (and therefore less able to cope with preditors). Those changes have created rabbits that are less well adapted for living in the wild. Wild rabbits are better rabbits - they are healthier, have a body size they can maintain with the available food, less prone to teeth problems, are fitter, can run faster and even have more immunity to myxomatosis. So what you are doing is taking the perfectly adapted wild rabbit and mixing in all the rubbish that humans have created.
So you've got rabbits with part 'wild' personalities that would be happier living wild but that have screwed up genetics which means their ability to survive in the wild is severly compremised.
It's worse if you are feeding them because again you're mucking up the natural selection - instead of rabbits that are good at escaping predators and foraging surviving, you get rabbits that are tame and good at begging for food surving and out breeding them. In otherwords instead of a healthy wild population you are creating a feral pet population that can only survive with your influence. And it will multiply very rapidly - rabbits can produce a litter every four weeks. Your babies are about to hit breeding age.
I'd suggest you either neuter her or keep her confined. It's not pleasent but nature will quickly take care of the crosses that are living wild.