The only ones are in the hotel—progressing you affection with each girl gives you access to, in order, a masturbation scene, a blowjob scene, and a vaginal sex scene; although that last one might come after the boat ride where you have to pick one girlfriend between the two, so it might not be available for both—and at the very end. As has been stated multiple times in this thread, this is first and foremost a cuckold game, and so 90% of the content in the game revolves around that fetish.
Oh i get it's a ntr game i don't mind those scenes it's just i wanted it to first happen with the mc before getting to other sex scenes, now I kinda feel like i wasted too much time time