I decided to read this because of Kingdom Come: Deliverance and the overview that Hans gives of it during his romance scene with Henry. The one that he told was perhaps a more romanticized version as it doesn't go into Guinevere's involvement at all. It was more a story of obsessive love that Galehaut had for Lancelot and a similar sort of obsession that Lancelot held for Guinevere. 

While Lancelot did love Galehaut, it was definitely a lesser love than what he had for Guinevere. And yet Galehaut continued to do all he could for Lancelot to be with Guinevere, despite how sad that it made him and Lancelot seemed physically unable to stop himself from being so enamoured by the queen.

It's a tragic story, for sure, and while Hans mentions the last of it being so tragic, it makes me wonder if the reason he even thought of it was because of his arranged marriage. The three of them turning in circles, trying to love one another but none of them being able to fully commit. It's really fucking sad and makes me wonder if that motif will continue on into the next game. 

Time will tell.