Man Marries Secretly After 8years of Marriage

Hello,
Can you take this? Can you do this? These are the words that come to mind as today's story was shared with me. 
A friend of mine once shared with me a believe that "a single person (spouse) cannot meet the emotional needs of an individual  which is why he or she will always find a way to fill the vacuum" and I totally agree with him but then, it leaves me wondering "God must know this. So,why did he create man and gave him only a woman and vice versa? ".
The issue of infidelity in marriage has grown at an alarming rate over time to a point that I find even the proposed solutions almost impossible as most advisors are very guilty......How do I know? Well,i don't (na everybody be thief ,na who dem catch be the barawo). LOL
Overcoming temptation when you're unhappy or unsatisfied and needy takes more than discipline, it takes God. I'm not trying to preach or be religious but i've come to realise that only God can really satisfy us in a way no man can. Only he can fill our emptiness in a way that we won't feel the need for anyone else. Even I am far from being connected with God on that level but yes we can get there and we will by God's grace.
Therefore, I will not pass judgement on my friend's husband who went ahead to have a big traditional wedding  with another lady after he has been married to my friend for 8years and has been blessed with 2 beautiful daughters. This very respectable man at work and church is a manager in one of the top beverage producing companies in Nigeria and is soon to be ordained a pastor at his church. His wife who is very heart broken at the moment and doesn't know what to do said her husband has repeatedly lied about having an affair with this woman whose bride price he just went to pay. 
She wouldn't even have found out if one of her inlaws who is a friend facebook hadn't posted pictures of the event. She believed that her husband had travelled for a business appointment for the week when she saw the pictures. Human beings can be very wicked (yes I know),are we allowed to be selfish? (sometimes,YES). Call me weirdo and I won't disagree,as much as I feel bad for my friend, I do not know the man's excuses for his actions. He sure hasn't done the right thing but these things happen and who are we to judge. I don't know what you'll advise but I think she should stay married,focus on raising her children and still be the wife she vowed to be. As long has he still takes responsibility for his children, she can only make smart choices henceforth and pray for her family provided there

is still love in her heart for him and he for her. If I were in her shoes, I will probably take option 2..........taking my kids and leaving him to enjoy his new marriage else I might just poison him. (Remember that we grief and react differently, so "pls don't judge me"(singing in Chris Brown's voice) lol).