I lost my father three years ago...the pain is still fresh in memory...but when you are physically vulnerable, the blow must feel far worse...I suppose like your father's spirit guided you through that phase, Rajesh will be an angel in heaven to his daughter and the baby to come!
Wonderful thought that...and I guess we should consider ourselves lucky that we have our own personal angels guiding us from up there...! Maybe, like your mom believes, you have got him back in the form of your son..God bless!