Why not go the 100% reality of basing the site around the idea that as a 50+ male, you've decided to book and fuck pornstars to make videos? That way there's no 'BS' scenarios of how you pretend to meet and get to fuck the girls, like as if it would really happen anyway...
If you want a 'story' element, make that about them arriving in normal clothing on the day of the shoot, and you telling them what to wear and what you want to do with them. Then that takes place as the scene...
In other words you are almost saying to the guys who watch, 'I'm just like you, and you could be doing this too, if you wanted to do so'
Most guys in their mid 50s have a bit of spare cash, and would LOVE to book pornstars to come around and act out their every fantasy... But they can't because they are married, or have a GF, or are afraid of the kids finding out, etc etc, so those same guys can spend that money on your site instead, and live vicariously through you, with no real world consequences.
Finally, just a tip, but don't fall into the trap of making the site / videos 'Too Much' about you... Remember, it's ALWAYS, first and foremost, about the girls... people might 'buy in' to see 'Average Guy booking and fucking pornstars' but they are NEVER joining up to see you. It's ALWAYS the girls.
Good Luck
