An excerpt from Mystery Method:

But if instead you were to say, "Hey, let's stop by my place on the way o that party; I have to show you my tropical fish," now she has an excuse and plausible deniability to stop by your place and then—oopsie!—-have sex with you. "One thing led to another..."
This is why serendipity is so romantic. After all, if it was meant to be,then how can it be her fault? Who is she to deny Fate?

Is it cheat?