AmateurVoyeurForum.com has no secrets in its name. It is a forum where all amateur voyeurs are welcomed to share their private porn materials. It is not a big forum, but an active one, which should be enough for you, if you only want to spend a little bit of free time. To be more precise about it, let me share with you these numbers: 5.000+ threads, 707.000+ posts, 143.500+ members and 12.500+ active members.
Some of their sections would be: amateur pictures (amateur erotic and hardcore pictures, party girls, amateur galleries, more), voyeur and exhibitionist pictures (girls on the beach, upskirt and downblouse, more), amateur videos, voyeur videos, found on the web, news and so many other boards. It is free to browse around and you can even download videos without signing up. Still, if you want to interact with the community or if you want to upload and post your own content, you will need a membership. This will also be free.
If you and your girlfriend make a modern couple and you have a thing for exhibitionism or sex in public/outdoor, get on AmateurVoyeurForum and become reliable members of this community. Click the screenshot to see it!