Just Google Slutwife and look at all the links being used for the images you find there. You can go to https://theporndude.com for links of places to post pics. Of course this site is excellent in getting your materials seen and put on the search engines.
Oh always give permission to have your materials reposted and I assure you they will start popping up everywhere. PLEASE only do this with your wife's knowledge. Once out there you can't get it back.
Good luck and welcome to your new home for like minded couples.
If you need help you can continue the conversation here in the thread or shoot us an email to firstname.lastname@example.org.