Aio my gf went on a date with another guy.

For more context My gf(32) and I(31) have been together for 3 years. We decided to spice things up by joining this fetish website online. We created a couples profile and have been trying to find our groove. Last week I found her messaging this guy on this website behind my back. Which was weird because she asked to share location just a few weeks prior. Aio?