In the middle of the night, his stepfather beat his wife's two children

The story is about a mother who goes one step further, marrying a new husband long after her husband passed away, because she wants a man in the family to take care of her two school-aged daughters. But I didn't expect that he was a pervert. From the first time his wife brought their two stepdaughters home, he always stared at their chests.
Because the house was cramped, all four of them slept in the same room. In the middle of the night, seeing his wife's daughter in her thin pajamas made him unable to bear it anymore and came closer to touch her, then &8230;