I have & it will be one of the biggest hurts you will ever experience in this life. Just let it all out!!! They are family & if they ask for it they deserve your very best honest opinion of what happened.
When that happened with me, I had a cow!!! My family saw sides of me that I DIDN´T even know existed. It was embarrasing at the moment only because I was the one who had been screwed!!!
It was my mother & my husband that did it, of all people!!! The two people that I trusted more than anyone else in the whole wide world!!! I still to this day don´t trust either of them & would not allow myself to be put into a position where their trust was detrimental to my life, or my childrens.
That was 3 years ago. And I don´t have a problem forgiving them both (I´m still with my husband) but I will never forget it!!!
And they both know if they don´t give me the respect I DESERVE they will not have me in their lives. Those were my last lines on the subject with them both & I wasn´t joking!!!