My mother in law and I are at odds with one another. I take full responsibility for my actions and the words spoken. While I've tried to reconcile with her, even admitting to her that I was wrong, and sincerely asking for her forgiveness, she refuses to talk to me face to face. I had to text her to express my apologies. My question is, what else can I do?

At this point - nothing. Maybe she just needs some time and space to cool down.

Where is your husband in this problem?