My mom gave my half sister my dad's number,
And she NEVER called.

My dad had a feeling that she wasn't serious about him being in her life. She just wanted a reason to complain...

My dad said that she's done this before, where she writes or calls and says something to the power of, "Why aren't you in my life?" And then when she's given the chance to actually talk to my dad, she refuses.

So I guess the issue is over?