Wesley Crusher (Mirror)

In the mirror universe, Wesley Crusher was the son of Beverly Crusher and Jack Crusher and the father of Lillian Crusher.
===Worst of both worlds===
The son of Beverly Crusher and the pirate Black Jack Crusher, Wesley was apparently orphaned and was forced to take care of himself. He was unaware of his identity of his father, who died in 2359. By 2371, he resided on Celtris III, a Klingon-Cardassian Alliance world governed by Gul Madred. He formed a friendship with the archaeologist Luc Picard, often guarding his vessel Stargazer in exchange for money. Unbeknownst to either of them, Picard had been a friend of Wesley's father prior to his death. 
In September 2371, while attempting to guard the Stargazer from a pair of Klingons named Gwarz and Khone, Wesley was severely beaten by the two Alliance officers. While Gwarz and Khone were still ransacking the ship, Picard discovered him lying in a pool of his own blood on the Stargazer's ramp. As no Cardassian physician would waste time or resources treating a Terran, Picard brought him to a Terran healer named Momma Pulaski. Although she promised to care for him as if he were her own child, Pulaski was sceptical as to whether he would survive. However, she believed that his youth gave him a good chance of doing so, though he would be crippled for life even if he did. Wesley's brutal treatment inspired Picard to follow in the footsteps of his former lover Vash and join the Terran Rebellion. (TNG - Mirror Universe novella: The Worst of Both Worlds).
===Dark mirror===
In one permutation of the mirror universe, Wesley was an ensign on the ISS Enterprise-D. Like his counterpart, he was often stationed at the conn station. Wesley hated Captain Picard for the death of his father, and made an attempt on his life. When Riker lets him leave the bridge, knowing what Crusher will attempt, Crusher chases down Captain Picard and tries to assassinate him, but fails. What nobody in the universe knows, other than the crew of the USS Enterprise, is that this is not the regular Picard, but the Jean-Luc Picard from the Federation universe. Picard's henchmen send Crusher to the agony booth, where he does a spell until Picard orders him confined to quarters. Captain Picard realizes that Riker would have been happy to have Picard dead with minimal risk to himself. Wesley's fate after this incident is unknown, but if word gets out that Picard made the mistake of going around unguarded, Wesley is not likely to face punishment. (TNG novel: Dark Mirror).
Wesley fell in love with a crewmember and had sex with her which produced Lillian Crusher.