My T has sent me texts by mistake, and I, too, have sent her texts meant for someone else. I've never brought up to her the contents of the text (usually meant for her husband). This is why I try to delete text threads. If she's not in my text box, I won't accidentally send her one. We both just kind of laugh about it.... and when she has sent me a text by mistake (only 2-3 times in 2.5 years) I text her back and tell her so right away.