Adultery

I am 28 years old and got married 2 years ago. My relationship with my husband was not sound and was suffering from domestic violence i was very afraid of him so didn't took any step.Mean while i met a guy who was brother-in-law of my husband's best friend.we started sharing our problems came closer and with the flow went in relationship from past 1 year.Now his sister who was also good friend of mine came to know about our relationship she has some chat and photographs of us. She z harassing me that she will took me to the court claiming that i have exploited his brother emotionally and physically. I don't know what to do she might expose this to my parents i will not be able to face them even though they know about my relation with my husband and we were planning to get divorce from him soon. Can she file against me anything like this. I got PR canada and flying in next month don't want this mess yet. His brother and i love each other unconditionally he is standing by my side what can i do please help me.