I would feel uncomfortable about the fact the woman who wrote the story found it necessary to 'soul bond' your boyfriend to herself. I would question her motivations, in my head... not to her directly lol, over why she felt it necessary to be connected to him (even just in fantasy) it would be different if some random person connected him to her... but she connected him to herself and I find that very action to be suspect. Do you go with him sometimes? Have you seen this woman? Is she overly nice to you or overy distant? Either could be a sign she may have a lil crush on your guys -- but either way that doesn't mean thats his fault.

It would be different, I think, if he wrote a story where he picked a specific girl to be 'soul bonded' to ... then i would go hmm... why her? Etc.. but he is just acting out a role someone else wrote. I do not do Larping or anything of the sort, but I know people that do... and I know that some develop relationships within that community... like with any community. Just because its 'acting' doesn't mean there is some wall dissconecting them as humans... just ask jennifer anniston :|

But seriously, I don't think you have anything to worry about...I think becoming too upset over this , if its a true passion of his... the larping , and I'm betting it is... will drive a wedge between the two of you. You don't want him to get to the point where he isn't telling you whats going on with something that means so much to him. So try to keep an open mind... and don't be afraid to ask questions, just tell him the truth that you feel a little uneasy, that you trust him, that you just want some reassurance now and then... thats totally normal.