Andromeda Adventure. Invasion Planet Earth, #3

Josh was genetically modified by Iris, an alien woman to have increased intelligence, sexual abilities, and be able to attract women easily.  He has acquired three dozen wives so far and doesn't want any more although his wives are professional women and brilliant in their fields and has made his family rich. He is a high school principal so is off for the summer.  His Andromeda wives want to take him and the rest of his family to Andromeda on a vacation.  They have an intergalactic starship capable of making the trip in comfort.
Since the trip will take a month to get there, Josh doesn't want to go. He would rather lie around the swimming pool, go fishing, and make love to his wives. In his last trip to another galaxy, they ended up getting into a battle with an alien species.  He also acquired five beautiful new wives which he liked but could have done without. His Overlord wife, Beth, decides to make this trip into a military and diplomatic operation which Josh hates.
To make matter worse, she expects Josh to be ships counselor again which mean he has to provide sexual relief to single women on board who need counseling.  She tells him that she will just upgrade his sexual abilities if he has any problems. This novel has graphic sexual scenes and is intended for mature audiences. This is the third novel in the Invasion Planet Earth series.