<human>: Can you provide a brief overview of the text?

Long story ahead: 

One of my best friends got married this past September, they have been together for nearly 6 years and everyone including her friends and family loved her husband, they seemed very very happy together. 

About two months in she started to notice that things seemed off between them, and that he was distant. When she confronted him about it, he told her that he didn't love her anymore and that he wasn't happy.  After TWO MONTHS of marriage. She was shocked obviously, and eventually it came out that he was really struggling with depression; he told her that he wanted to work on things and that he DID love her, but he was unhappy with himself. 

For the past six months they have been going to couples counseling, and they have both been seeing therapists on their own. During this time he had been spending about 3-4 nights a week with a coworker, because he "needed space". He went as far as to drive her by this coworker's house, talk in detail about what the room he was staying in looked like, and projects around the house that he was helping his coworker with.  

During the time they were working through things, they decided to book a honeymoon to Cozumel, when they came back my friend received a text from a woman who said she had been in a relationship with husband since August (a month before they were married). Husband has been spewing nothing but lies to my friend for the past 9 months, everything has been a lie, everything. 

She left immediately and came back to our hometown where most of our friend group lives. Now, less than a week later, she is back living with him, and has pretty much decided to take him back. She is justifying his actions because of his depression, I feel like she is literally making the worst mistake of her life. How can I make her see reason? Please help.
<bot>: Friends husband has been cheating since a month before their wedding, she's going back to him anyway because he was "depressed", I want to make her see how huge of a mistake this is.