Christians answer this question?

My best friend likes this 33-year-old and she is 22. Her parents told her not to take to him anymore when he asked her out becuase they didn't like that way he "approached her"..anyways she really likes him and he really likes her. They being talking for almost a year and they have an emotional tie towards one another. But I am worried about her becuase as christians she and I are virgins (I am the same age) and we don't believe in premarital .. But he is definetly not a virgin he has two kids (one a 14 year old, the other a 8 year old girl) by 2 different women when he was in his early twins, he been to jail in this early twins. What I am afraid of is that they will become to close and eventually have . They kissed one time and it was very pionate she described it. Her parents don't even know that they are talking this much and it has been a year. To make matters worse he thinks she's "the one" and wants to settle down with her and eventually marry her. We are apostolic.