Djmac,
You sound like such a warmhearted, compassionate soul.
The fact that you don't want to see anyone hurt, shows how much you do care about doing the right thing. And I agree with you completely. If you and your wife do get back together, it has to be for all the right reasons, not out of guilt or fear of hurting someone. It sounds as if your wife knows how to push all the right buttons within you to keep you questioning your current decision to leave.
I am very proud of you and very happy that you took your son with you. Even in your confusion, you can at least look over at him and know that you might be saving both of yourselves a lot of hurt further down the road.
I am so terribly sorry to hear about your father.
I don't know why it is, but it always seems that sadness and misery have a way of compounding themselves. This has got to be an incredibly hard time for you. In spite of your wife's pleas and tears, now might be a good time to focus on your father and his needs. If your marriage is meant to be, it will still be there later. Scattering your emotions and energy at this time sounds like an impossible task. Is there anyway you can explain to your wife that you need some time for yourself? Still allowing time for visitation with your son, of course, but not focusing on your and her problems right now might help.
My heart goes out to you, Dj.....hang in there, friend.