Grisham

 is located in Modoc. He will give you a quest to protect his brahmin against a pack of wild dogs. He will pay you $1000 for completing the quest, but will take away $100 for each brahmin killed. You will be teleported to his brahmin fields upon accepting the quest and all wild dogs must be killed in order to complete the quest.

Married
You can talk to his children to do "something". After that you will get married. It is possible to strike fear in Grisham's heart after this. Once you get the Separated perk, you can tell him his son or daughter is dead. You can lie though, but if you tell the truth he will die.