The sh*t is fix'n to hit the fan now ! Machida-san ... slap him ... slap him hard, slap him NOW ! Make it clear that this is unacceptable ! And don't keep it a secret from Naruse. Have a discussion and tell him the truth. All of it. (You've been warned ! LOL )
This is what should happen, but for some reason I'm afraid it will be more like "Machida saying nothing to the guy, then she starts being made at Naruse and slaps him instead".
The sh*t is fix'n to hit the fan now ! Machida-san ... slap him ... slap him hard, slap him NOW ! Make it clear that this is unacceptable ! And don't keep it a secret from Naruse. Have a discussion and tell him the truth. All of it. (You've been warned ! LOL )