From the gospel, we know the woman at the well, received the words of Jesus. We don't know about the future of the adulterous woman, but she was warned.

But we do read that Jesus warned the cripple, cured by the pool. Continue to sin & something worse will happen to you. 

I think Jesus is saying that "I forgive you, but you must make an effort to avoid sin, & not let sin blind you from truly asking for forgiveness".