I'm not commenting on anything but the welfare of this girl - she's done her 'work' and maybe you could spay her and find a nice home where she can be part of a family and have a nice doggie life ? There's people that would love a 3 year old !! I mean a non breeder who would just like a companion...
why not give her a fresh start ? I bet she can be socialized and make someone a wonderful pet and you'd know you did something that's in her best interest. I wish her all the best too - She's probably just waiting for a place where she can fit in and be 'just a dog' - spoiled silly like most of ours are