still lost

I have been trying to get past my wife having 2 affairs that I know of.  With all the lies she has told and the way I had to discover her affairs, I find it really hard to believe anything she tells me.  It has been 2 years since the discovery of the first affair and has taken almost another year to discover the second one and she is still feeding little bits and pieces of what and who she was.  I am so lost and confused and slipping a little and leaning more and more towards leaving.  I have 2 children that deserve so much better than this and not sure I am doing the right thing trying to keep our family whole.