Hello Mike. I'm glad to hear that you are doing well with moving forward, despite such heartbreak. It sounds like, just like in most cases, your dad and siblings are projecting what they think is best for you as far as childrearing is concerned. I'm sorry that they do not respect your decision to be sterile by choice and quite frankly that is their own problem to deal with as you are the one who truly has the reins on your life path. Your mom seems to be at least a certain amount of support as I'm sure dealing with several GCs is hard enough.
As for your race, much luck to you. It's nice to see another roadie. I've been riding for several years, but haven't raced in a few. I too have thought about certain aspects of life as being like a nasty headwind. I agree that childrearing is more than your typical "argy-bargy."