I have a friend, who is presently living outside the country trying to survive. Just before he left, he begged me to allow his girlfriend (a footballer) to stay in my house for a while pending the time her visa would be ready for her to travel out and play professional football outside Nigeria shore. In the name of friendship and brotherhood I agreed to his proposal.
In the long run, the visa which was the main reason for her staying in my house did not work out, so she has to sign a contract with a local football club in Nigeria for the time been.
As a result of her new contract in this club, she has to stay back in camp and does come to my house anytime they are freed to go out and some time stay in my house when they are on break. During this time she does come with her friend to stay with her because most of the times I don't stay at home. This is because of the nature of my job and the part time program I run.
This went on for more than a year (though long beyond my expectation) and I was beginning to feel inconvenienced by that. Though my girlfriend did not like the Idea, but I was able to manage it because she is not living with me in the same station.
However, I found out that, in the new league season, she was not included in the team list, which implies that she does not have contract with the club. So I called the guy (my friend ) to do something about her stay in my house, and he promised me she would leave just when they pay her the outstanding the club is owing her (including others that her involve). So I said ok. I was doing all of these just not to hurt her and not to betray the friendship that exists between us (I and my friend).
Just recently, apart from some unpleasant thing she does that I have been managing; I got to know that she is a Lesbian. I was totally disappointed, down casted and furious about the whole messy thing. I got the revelation when her friend (lesbian mate) who happens to be the person that had been staying with her had a change of heart (she repented). And, ever since she told her no more games they've been having problems. The trouble was so much that their peers (Colleague) noticed it, including some of the camp officials.
Her friend’s confession reveals that she has been doing this for years and many of her relation know her with that. Now that she has changed, she does not want to do this again with her (my friend’s girl) but she (my friend’s girl) would not stop. She kept on doing this to the extent of bringing in another girl to my house in the name of friendship visit, but the main motive is to Lesbianize.
I need you guys to advice me on what to do, yes she must leave my house, but DO I have to reveal this to my friend Immediately or do I wait for a while for him to him to find out by himself or till someone else tell him? This is because he loves this girl and actually has plan of marrying her. I can’t imagine how he will feel when I tell him this .

Thank you!