I recommend "I'm Pregnant with the Prince Regent's Baby", an ancient romance novel. In the novel, Ian disguised as a man and became a little emperor. In order to survive, he had to cling to the male protagonist's thigh, but later, the female protagonist was reborn. Both the female and male leads were related to Ian. In the end, Ian actually got pregnant. This book fits the description of the problem, and the plot is interesting. It's worth reading. I hope you like this fairy's recommendation. Muah ~😗