Companion

Dalton was prepared for the six-week trip from the mines on Pluto to Earth. He liked being alone because Earth was crowded until a massive solar storm knocked out his main engine. Now it was going to take almost a year. For the first time, he felt lonely until an alien ship heard his mayday message. For the Borlons nothing is worse than being alone, so they make him a companion. Everything was new and exciting with Sam.
On the ship, there was no one to tell them that having sex all the time was wrong, but would she leave him once they got back to Earth? All the characters are over the age of 18, none are related, and all sex is consensual.