That's a good indication of his willingness to take responsibility.
Do you know where his wife is at in her Christian life with regard to reading her Bible or doing personal Bible study? If she isn't prepared to read her Bible and study for herself but rather just reads books about the Bible or listens to sermons, she will probably not handle this well. Unfortunately, the statistics for divorce among professing Christians in your country are not encouraging and most divorces are instigated by wives who will seek divorce for unbiblical reasons. The blog written by
@WifeOfHisYouth is a testimony to the power of God at work in a woman's heart as she struggles through learning about biblical marriage. I can also tell you from my own experience with having two wives that it is the power and authority of the Word of God that will get you all through the challenges this will bring. Family and friends will actively work to destroy what God graciously gives and blesses. It's really sad but it is the so-called Christians who will push for divorce the hardest in spite of there being no grounds for divorce with biblical polygyny. Pray for his wife and keep your own eyes wide open as other women will work behind the scenes doing their utmost to break-up your relationship. Once people see you are standing strong on the authority of God's Word, they will pretty-much leave you alone. May God uphold and strengthen you as you stand for the truth of His Holy Word.