You are deep inside the queen's womb at exactly the wrong time, or the right time, depending on how you look at it.
The king's sticky semen is everywhere: the queen still drawing a stream of it into her womb, through her cervix. At the other end of her womb, a small white orb squirts out of a small hole.
One of her eggs.
The egg sends releases a chemical message that excites the king's many sperm cells. They start swarming that egg. From another tube, another egg emerges.
You panic. Perhaps you thought this was a simple, pleasurable, temporary ride... a little "harmless" sexual pleasure for a creature who could have easily torn you to shreds had you refused her wishes. Now you know the truth: this lioness is in heat; she's trying to become pregnant, with you inside her. If she succeeds... well, it can't be good for you, can it?
