2 points to make that are relevant though not necessiary important!!!
It is estimated that 60-70 percent of American Republicans do not accept evolution as the bona fide morphology of man;s creation.
Considering this is by far the greatest political party in the entire world, one may find this worrying.
Second point is whatever your friend's views or belief, God gave her free will. he gave her the power of choice, the power to make her own mistakes, the power to NOT adhere to his ideals.
This "free will" is seen as a cop out by non-believers as it can explain murderers, rapists, terrorists, kiddy fiddlers and the Welsh but it is what I believe.
Whether scientific fact or religious voodoo, I have the choice to committ adultery if I want to.
Also, Christianity, unlike Islam, is changeable. There are gaylords, pro-choicers, divorcees, tax collectors and Sunday workers all in the Anglican church. If she feels the ned to go over board with an illicit, adulterous affair, then there is clearly something wrong with the marriage in the first place. she should still work at it though as marriage is sacred, if not a legally binding contract of love.
Therefore, she is s sl4g. But still a Christian sl4g.