I don't post here anymore, but sometimes check in because there are threads I still follow. However, I felt I had something to add to this discussion
My husband's MLC is in the past as it reached its peak in the spring and summer of 2012. After years of deep depression and strange behavior and a lot of blaming everything bad on me, he finally left me and our then 4-year old son a week after BD and moved straight into OW's cramped apartment. OW was a young girl, a co-worker. Anyway, what followed was script, script, script.
I'm not sure when or how I began praying. I suppose I began more or less right away, because I was very depressed and almost suicidal in those early days. Then at some point I connected with another woman on this forum, whose timeline and circumstances very much matched mine. We started praying together, mostly via Skype, since she was (still is) in Europe and I was (still am) in the US. For some reason we both "felt" the Virgin Mary present during our prayers, and so we started praying to her (which was quite new to me at the time). I cannot remember whether it was my friend or I who found the Express Novena (aka the Memorare), but we began praying it several times a day, simultaneously. I still have one of the papers where I have checked off the prayer nine times. Miraculously my friend's husband returned a few months into our praying and a week later my husband came back as well.
A friend of me in the town where I live (and lived at the time), asked me who the woman was who was walking next to me all the time. I thought she was crazy, because I was always walking alone or with my young song, then I realized it was Mother Mary she saw next to me.
My friend from this forum and I still occasionally pray together and we are very much in contact, but the miraculous, powerful feeling of having the Virgin by our side the way we had back then so intensely, has never come back. I know Mother Mary is with me at all times, but I do miss that very intense feeling of her presence.
This is the prayer, to be repeated nine times.
"Remember, O most gracious Virgin Mary,
that never was it known that anyone who fled to thy protection,
implored thy help, or sought thine intercession was left unaided.
Inspired by this confidence,
I fly unto thee, O Virgin of virgins, my mother;
to thee do I come,
before thee I stand, sinful and sorrowful.
O Mother of the Word Incarnate,
despise not my petitions,
but in thy mercy hear and answer me.
Amen"
To conclude: My husband has been back for seven years this August, and is better than ever. It took me a long, long time to get over his MLC, but these days I rarely think about it. We have a beautiful, talented 11-year old son, who thankfully remembers little if anything from this horrible time, and we have a wonderful family life.