i want a guy to seduce my girlfriend

and then fuck her while im watching, and i want her to think that she is dong this by herself, and that i dont know a thing about it...so i would meet the guy first and we would talk about how he should go about getting her in bed...i want a black guy to do her but i want his cock size no bigger than 8. my girlfriend is 24 chinese 5'1'' 105 lbs....with the tightest pussy ive ever had. jesus christ its tight.