Starship Wanderer. Invasion Planet Earth, #8

Captain Josh Miller hated Alien Bugs for good reasons.  Humans and Alien Bugs had been locked in a war for eons.  He was skillful at killing them so earned a reputation as a first class starship commander.  The Alien Bugs got even by killing his entire family and transporting him with his android woman to another universe.  That set him on the road to changing universes when he wanted.  He had no problems picking up new wives as he lost some for various reasons.  The most interesting Earth he visited was run by only six Alien Bug Queens so he killed them and took over.  This planet had a million women and only a 100 men.
He was popular and was soon president of the planet so he had his pick of women.  At first he was content, but then he got bored and moved on.  His starship was called the Wanderer since that is what he did best.  There are some explicit romance scenes so is only suitable for mature readers.