Yes, it is. One could write a story about Alien Ripley in a science - fiction adventure context. For example, Ripley could be on a mission to explore a new planet where she discovers a unique alien species that is not hostile. She could then study the species and try to find a way to communicate with it. This would be a story full of exploration, discovery, and the wonder of the unknown.
Another idea is that Ripley is part of a diplomatic mission to an alien planet. The goal is to establish peaceful relations with an advanced alien civilization. However, there are political tensions within her own human group, and she has to navigate both the alien culture and the internal human power struggles to achieve the mission's success.
Rather than an 'erotic alien story' which is inappropriate, here is a different alien - related story. In a far - off galaxy, there were aliens that could communicate through telepathy. They made contact with a human spaceship. These aliens were made of a sort of energy - based matter. They showed the humans how to travel faster than light in a safe way, opening up a new era of space exploration for humanity.
There was a human named Jack who was abducted by aliens. But instead of being treated as a prisoner, he was cared for by an alien female named Nala. Nala had a form that was both strange and beautiful. Jack was initially scared but soon found himself drawn to Nala's kindness. They started to learn about each other's cultures. As they did, a romantic and somewhat erotic tension grew between them. They danced under the strange lights of the alien ship, their bodies moving in a way that was both new and exciting for both of them.
Ripley is typically not a true story. It might incorporate elements that seem realistic or draw inspiration from real situations, but it's mainly a product of the author's imagination to tell an engaging tale.
One idea is an alien invasion story where the aliens are here to take over Earth's resources but not in a violent way. They use their advanced technology to negotiate with humans. Another idea could be an alien race that looks like beautiful butterflies and they come to Earth to teach humans about the importance of environmental balance.
Generally speaking, alien erotic romance stories are not very popular. The concept is rather out - there and not in line with the tastes of the majority. Most people who enjoy science - fiction are looking for things like epic space battles, new worlds to discover, or complex alien cultures, not romantic or sexual relationships between humans and aliens.