How can I find a couple to have a cuck experience with

Hello! I am recently single, a little over a year,after being in a relationship for over 15 years. I am not ready to date or to have sex with a guy just yet and want to try having sex with a woman while the husband watches. I might be open to a threesome but not just yet. I just don’t know where to look for couples. Is there an app anyone can recommend?