Sorry for formatting. I'm on my phone and English isn't my first language.

I'll refer to him as C. C and I have been together officially for only 2 months. So far it has been going really good. And we've dated a bit before we became exclusive. We're in the honeymoon phase. So 

So my sister lives in Aruba and is getting married. And C is also invited to come. We live in The Netherlands.

So we were looking at tickets together on his tablet. He went to bed and I wanted to continue looking. So I went back for the tablet and I saw that his browser gave him the suggestion of frequently visited websites. Amongst that I saw this adultfriendfinder. Which I found odd. So I clicked on it and saw that it had notifications, that only happens when you have a profile. And indeed. I saw that he used it while we were already together. 

I'm mostly disappointed. I don't know what to believe. He told me that he very green in the sexual area and that he's not into lots of kink but this portrayed a whole different side of him and I really don't know how to approach him with this and I need advice.
user
boyfriend has an account on an adult website. I don't know
assistant
Sorry for formatting. I'm on my phone and English isn't my first language.

I'll refer to him as C. C and I have been together officially for only 2 months. So far it has been going really good. And we've dated a bit before we became exclusive. We're in the honeymoon phase. So 

So my sister lives in Aruba and is getting married. And C is also invited to come. We live in The Netherlands.

So we were looking at tickets together on his tablet. He went to bed and I wanted to continue looking. So I went back for the tablet and I saw that his browser gave him the suggestion of frequently visited websites. Amongst that I saw this adultfriendfinder. Which I found odd. So I clicked on it and saw that it had notifications, that only happens when you have a profile. And indeed. I saw that he used it while we were already together. 

I'm mostly disappointed. I don't know what to believe. He told me that he very green in the sexual area and that he's not into lots of kink but this portrayed a whole different side of him and I really don't know how to approach him with this and I need advice.
user
Boyfriend has an account on an adult website. I don't know
assistant