Ok is it just me, or would anyone else be as livid as i am..

My dad had open heart surgery on July 12, he had a 5 bypass with veins used from his legs an arms! With that beinf said today hes doing WONDERFUL many many great differences including his (RA) authorities ! But whats made me mad is that, my sister (his blood daughter) hasnt even called him to check  on him or visit at the hospital, an its ben some time now! My mom an him are divorced, and she went to visit him in the hospital (her an the new wife get along well) my sister, on the other hand, she is a grown woman with two kids hersel. she is 28! Im 24! Theres no reason she couldnt call him at least once! My other sister who works doubles 5 days a week just about went an visited him and im just Livid that my oldest sister has not! My mom says im over reacting, but am i really? My dads response is, well im used to it! Breaks my heart for him! Hes done his deeds in the past, reasons my dad an mom. Have split, more drugs no violence! But after over ten years, and plenty forgiveness theres no reason for it!