Very juicy chocolate girl, you should not refuse her even if you do not have a big dick. Look closely - the nigger pulls her only on the tip of his dick, so basically the length of his dick doesn't matter at all. Except for the thickness, but it's possible to find a pose and work it with a fairly modest sized dick. In the end you can buy a toy in a sex shop, it increases the thickness of the penis, and everything will be fine.
Sleeping with a stranger is no big deal. Getting naked and having sex on a rushing bus is top notch! Maybe for the busty brunette is okay, but I personally have never seen anything like this. Impressive and exciting!