My sister betrayed me?

Anonymous

So my older sister is protective however she is very hard in her ways and can be stubborn.

Background story: I had an affair with a man from work but he is planning to leave his wife. They share 4 kids.

my sister messages the son saying your father is having an affair and all this other crap. He has mental health isssues.

my sister never told me and is being rude to me.

is my sister in the wrong for doing that?

I know I am for participating in an affair but we decided we’re both going to get married.

My sister betrayed me?
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