Lena Dunham
Lena Dunham has responded to accusations of sexually abusing her little sister.Reuters

American actress Lena Dunham has responded to accusations of sexually abusing her little sister.

The National Review and a right-wing news site called Truth Revolt quoted passages of her memoir Not That Kind Of Girl and claimed that she tried to sexually abuse her younger sister, Grace Dunham.

In the book, she also detailed about masturbating in bed next to Grace.

The excerpt from her book read:

"Do we all have uteruses?" I asked my mother when I was seven.

"Yes," she told me. "We're born with them, and with all our eggs, but they start out very small. And they aren't ready to make babies until we're older." I look at my sister, now a slim, tough one-year-old, and at her tiny belly. I imagined her eggs inside her, like the sack of spider eggs in Charlotte's Webb, and her uterus, the size of a thimble.

"Does her vagina look like mine?"

"I guess so," my mother said. "Just smaller."

One day, as I sat in our driveway in Long Island playing with blocks and buckets, my curiosity got the best of me. Grace was sitting up, babbling and smiling, and I leaned down between her legs and carefully spread open her vagina. She didn't resist and when I saw what was inside I shrieked.

My mother came running. "Mama, Mama! Grace has something in there!"

My mother didn't bother asking why I had opened Grace's vagina. This was within the spectrum of things I did. She just on her knees and looked for herself. It quickly became apparent that Grace had stuffed six or seven pebbles in there. My mother removed them patiently while Grace cackled, thrilled that her prank had been a success.

The 28-year-old Girls star took to Twitter to respond to the accusations against her: