Should I allow her to talk to me on her friend?

I had to be abroad for work for a month and the lady (not my wife) reduced messaging me. I informed her about my date of return. I waited for 4 days, but she did not inquire about my arrival. I lost patience and went to see her and found that she was standing very close to a petty guy and she put her head on his chest. I returned my home understanding things.I blocked her everywhere but after telling her reason. Surely, I did not mention about her too close physical vicinity in message but other things. Now she has been trying her best to contact me asking why wrong has she done to get blocked. But she is not talking of what happened. On the other hand, she is trying to play victim card. In fact, I was to finance her business on a personal level, as we have been close to each other over a decade. I finance her, take care of her and she enjoys with others. There was similar a similar event in the past too. My question is: Should I get into conversation with her on this or No? If I did, she may use her charm to get me back to her, which is not really healthy.