Oscillation (слэш)

John reached for his own little parcel on the table. He eyed it curiously and reached out to remove the wrapping paper.
“Don’t open it. Please.”
John’s movements stopped immediately. The parcel remained wrapped. He looked up and watched Sherlock with wide eyes, surprise and concern about his sudden outburst written all over his face.
“I … I’ve realized that I made a mistake.”
At Christmas Eve, Sherlock visits John and Rosie to hand them their gifts. The evening makes him realize, however, that he can't possibly give his gift to John.