<human>: Give me a shortened version of the text

For me, it was from a novel called Assassin's Quest, the third and final book in the Farseer Series by Robin Hobb. Across the series the main character and a childhood friend fall in love, but he has to constantly put his duty to his King before her. In nearing the end of his final quest, where he hopes accomplishing it will allow him to live out his life peacefully with her and their newborn daughter (at this point he's been away for a very long time and she believes him dead), through an innate form of magic, he wants to see a glimpse of her, because he might die. In that glimpse, he witnesses his love, at the time being protected by a father figure of the main character, denounce his name, agree to marry the father figure after professing their love for each other, and having sex to consummate the soon to be marriage. I've never in my life felt such feelings of pure betrayal and sadness.
<bot>: The main character witnesses his love give up loving him, and chooses to start a new life with his father figure instead, whom he also loves very much.