First of all, my condolences to your family. I'm sorry to hear about what happened. If there's any guilt in your heart, I'm just here to tell you that you did your best. I'm very sure wherever he may be right now, he appreciates everything that you have done for him.
Sometimes it gives us comfort when they tell us "if it's their time, it's their time". But the truth is sometimes we can't help but think that we have certain control over decisions that could have lengthened their stay with us. No matter what happened, what I see is your concern and love for your father-in-law, and for me, that is admirable.
Wherever he is right now, I'm very sure that he appreciates you and all of his children. Thank you for sharing this with us, and we are praying with you as you grieve.
RE: No more pain for tatay!