RE: I just couldn't do it.....
Everyone hunts for different reasons, but if you were guaranteed that those two yearlings would be okay if you had taken their mother, would you have shot? Adams is right...those "babies" are no longer babies. They'll survive and be just fine. Also, if you orphan a button buck, good chance he'll stay in your area and make it his home. Damned if you do, damned if you don't, right?
Don't worry about it...you'll get many other chances to bag a deer w/ your bow.