My Mom + Text Messaging

My mom finally bought a cell phone. I'm so used to her not having a cell phone, that I forget to call her on it.
While I was talking to her today, I realized she has the ability to send and receive text messages. I teased her that I was going to send her six text messages a day. She panicked and begged me not to because she didn't know how to receive or respond to text messages.
As soon as I hung up the phone, I sent her a text telling her I loved her and to have fun in Tennessee. She sent a text back: "gh"
I instantly texted back: "What?"
Her reply, "ggg" !!!!!
I was laughing so hard. I called her while I was still in hysterics. She said she couldn't figure out how to type on the phone's number pad.