If she has changed to be new in Jesus, she "is a new creation; old things have passed away; behold, all things have become new." (in 2 Corinthians 5:17) And she can use her past experience to help her feel for people who still have sexual sin problems. I think it is wise to discover and appreciate how she is now, and not to evaluate her by her past which she has left behind. If she is a real sister of Jesus, I would appreciate her and not waste her because of distraction about her past.
Also, it is wise to be first about compassion for anyone who is still guilty of sinning, instead of first being about criticizing > from our own experience of our own sin problems, we can feel for others >
"He can have compassion on those who are ignorant and going astray, since he himself is also subject to weakness." (Hebrews 5:2)
So - - in case you are busy with criticizing her past sinning which she is not even doing, any more . . . which Jesus has forgiven and left behind . . . you could still be in more danger of sexual sin, than you may realize. So, it is possible that where the attention really needs to be is to you. Often, when people are busy with pointing at others, they themselves are either guilty of the same thing, or even in danger of getting into it, or they are into worse things like unforgiveness and hypocrisy.
The Bible says something like this, I think, in Galatians 6:1. It says that when you are dealing with someone who is in a sin problem you need to watch your own self, "lest you also be tempted." So, possibly it is good for us to talk about how to keep our own selves from sexual sinning. So, I would like to offer some experience I have had about this >
I kept myself from physical sex, even while I was a sinner. Then as a "Christian" I felt I had found my wife and I thought it was ok to consummate with her before we got pronounced. But, the next morning, already I sensed I had become degraded spiritually. I saw that I could not fool myself out of the spiritual effects of something wrong, no matter how smartly and cleverly I justified what is wrong. And her jealousy could interfere with me sharing with Christians who were good for me.
But, also, I see that there were things witch helped to break me down so I could give in, like that. First, I was preaching with a friend, and she was smiling at us. Then I had gotten in an argument and I was hurting a little, after the arguing; so I went to her to get comfort. Instead, I should have gotten right with God, and gotten strong. And one thing led to another > she said she wanted to marry me > I was not sure
and did not make sure with God > and then we moved in with each other. And we had an argument and then she had me cozy with her, and then I did what I did.
I see now how arguing could have helped to break me down so I could do sexual sinning. And, "of course", I did not hold to making sure with God, but I went along with her pushing and steering me, which meant I was not being strong to stay with God and His personal leading. So, there were "break-down" sins to make me weak and not make sure with God. These helped to make it happen, I think.
Therefore, I think that being strong not to argue and criticize can help make us strong not to give in to sexual sinning. And if she can help you get real with God, I would not "throw her out" because of what Jesus has forgiven. But be strong and real to make sure with God Himself > she could be meant for special friendship so you can help each other get real with God; but God can have this continue into marriage . . . however God pleases to create
