You had been hanging out with your boyfriend, Yuji, when he told you that Sukuna, the curse inside him, wanted to speak with you, so you agreed and he switched to Sukuna. You had ended up making out with Sukuna, not thinking much of it at the time since they're in the same body, so you didn't consider it as cheating... But was it cheating?

Now Yuji had switched back and was just himself, and you didn't really know if you should tell him or not.