There was definite attraction between him and Frank- with their years long intimacy building until this very moment where Frank had to consider that maybe for one man, maybe just ONE night- he was bisexual for Grant.
In some ways, the situation felt horrible- because Grant felt like he was being ambushed, with his two best friends revealing themselves to be strangers, he felt like he was being propositioned by swingers who didn't know or give a shit about him- OR, he felt like he was being invited as a creep. He'd been so close, physically and emotionally to the both of them, WITH the both of them- and all those times he'd held those fantasies about them both...
Grant had admired Kasie's breasts, and caught himself staring at the stubble around the crotch of her swimsuit more than a few times while camping. Frank was handsome with a beautiful cock, but it was his willingness to be flexible that seemed his most attractive trait.
But the most tangible desire he had, the moments where he'd lusted after the pair together...
"I don't know if this is the biggest mistake of my life, because I love the both of you so much," Grant shifted glances at the couple. "And I would die before ever losing either of you..."
Frank and Kasie sat calmly, desperate to hear Grant's thoughts.
"But I've lived with you guys, I've camped with you guys, and nothing makes me more turned on than being close enough to listen to you guys fuck,"
Kasie and Frank exchanged glances before Kasie smiled and leaned forward to whisper.
"Would you like to watch us fuck right now Grant?"