My grandmother calls me about every 2 hours and leaves me messages that say, "I'm so sorry if I said something I shouldn't have. I hope that you will forgive me." I don't answer my phone while at work, but when I call her back she doesn't say that to me and she doesn't bring them up. I don't bring it up either. Should I bring it up or how should I handle it? There are times she doesn't remember calling me or what she said on the message so I wasn't sure if I should address this.