I'm not going to call my mom repeatedly after I called her once and she didn't answer
Do you think your mom may have been busy?
I know she's busy. I just wish she'd answer the phone for me.
It sounds like your mom has a lot going on. You should be patient with her. She probably just can't answer right away.
I went over to her house! I don't see what the problem is.
You should need to realize that people have lives outside of you, and that your mom can't put up the phone every time you call. You should show a little more patience for this.