321 War of egos (3) [Bonus chapter]

Kalina stood at the door frozen and stared at the carpet. She didn't mean to peep, but her sister noticed her before she made her exit. Now what?

Kalina fidgeted awkwardly while trying to figure out what to say. "I heard you are back from the hospital and came to check how you are doing."

"And you just came in without knocking?", Tatiana asked angrily.

"I knocked."

"And you got in without permission!?", Tatiana's voice was rising.

"Well… I heard voices and I thought…" She couldn't pick up the words, but it definitely sounded like a conversation. How was she supposed to know they were naked and going at it? Who has discussions in the middle of coitus!?