Author's Notes: As is usual to state on Literotica, in case it is not clear enough from the story itself, all characters participating in sexual acts occurring in this story are at least 18 years of age.
***
After the children appeared in our family, my wife gradually began to cool down to further family life. I was sure that this was a temporary phenomenon after the birth of our first daughter, Vika. It seemed to me that the second child would correct the situation. But with the birth of Marisha a year later, it only got worse. Constant quarrels, scandals and threats made life a living hell. Therefore, when my wife, who suddenly became a beast, offered a divorce, I gladly agreed. My wife agreed that my daughters should stay with me, and hastily disappeared from our lives. I managed to find a good job, and soon my whole life began to revolve around little adorable creatures.
I was happy to devote all my free time to Vika and Marina. And while I was at work, my parents were watching them. The daughters grew up in an atmosphere of love and care, they were not denied anything. Surprisingly, this upbringing did not lead to excessive capriciousness of my babies, but just the opposite -- it taught them to appreciate the family budget and a good attitude.
My girls looked like real beauties. They took care of themselves, wear revealing clothes and cause immodest thoughts from men they met. And all this despite the fact that both of my daughters remained without sexual experience until they entered the institute. This was explained primarily by the fact that most of the guys who surrounded them were sure that such girls simply could not be alone. But neither Vika nor Marina could stand noisy companies and loud music, they practically did not appear at youth "parties", they did not have a pack of girlfriends and the habit of giggling at every opportunity.
Sincere smiles could often be seen on their still very naive faces, an artificial grin - never. For some reason, most of the guys considered all this signs of inaccessibility and arrogance, none of them ever dared to talk to my daughters.
Naturally, all this did not dampen the sexual hunger of my girls in any way. Several times I accidentally caught them doing immodest things, like masturbating or watching porn together. I never made a tragedy out of it, but on the contrary, I believed that it was quite normal... But one day something happened that radically changed my life.
I got home from work earlier than usual and opened the door noiselessly. Usually one of the daughters came out to meet me, but this time it was different. Groans and groans came from their room. "No other way than a new porn movie has been downloaded," I thought and went to the threshold. The moans became louder, and I realized that they were not coming from the speakers, but belonged to my girls.
When I looked into the room, I couldn't believe my eyes. Completely naked nineteen-year-old Vika was lying on the bed, her legs spread wide, and between them eighteen-year-old Marina in a T-shirt, with her eyes closed, was using her tongue in her sister's vagina. What I saw shocked me so much that I didn't even dare to intervene -- I just stood in the doorway, dumbfounded, looking at Vika writhing and Marina caressing her. Suddenly, Vika threw her head back with pleasure and opened her eyes wide when she saw me. Interestingly, she did not pull Marisha back, but only began to moan a little quieter. Marina was distracted and raised her head. When she noticed me, she froze and stood up, swinging her legs over the side of the bed. Vika also took a more chaste pose and uttered the first phrase:
"Dad, why are you so early?"
"I finished my work earlier... Girls, and... - I hesitated, not knowing how to ask. -- How long have you been doing this?"
"Dad, don't be a bore. After all, nothing terrible happened, right"
