A visit with my Dad

I am in Myrtle Beach right now. My dad and step mom have been here since the middle of January. They are going back home to Pittsburgh next Friday. I spend as much time as I possibly can with them when they are here. I do not always get to Pittsburgh. In fact I have not been back home since Christmas of 2006. I love spending time with my dad. I guess one could say I am still daddy's little girl in my heart. My dad is a good Christan man. He is the one who lead me to the Lord. I have three other sisters with the same dad, and two step sisters who call him dad. What I do not understand is my sister who lives here close to me. She talks about "her daddy" all the time but he has been here since mid January and she has not come up to see him once. I do not understand, I have been here every time I have a day off and if I have a few days off in a row I stay here with them. Ye t she has not been here once. Dad notices too. He told me she has not come to visit him....He is hurt by it... I know I should not have but i sent her a text today that simply said "dad is leaving next Friday and you have yet to come visit him...maybe you should this weekend." I hope she does....He tries not to let me see he is upset about it, but I can see it. He is hurt and I hate it.
Anyhow I will spend my few days with him and come back next week for my few days off...Just to spend time with my dad.