Arranging a threesome for your bf? Make sure to pick a futanari. The "get her ready" excuse is a great way to get him sucking cock so you can watch. After you ride the futa a little, you can then let her fuck your bf extra hard.
"Mm, your boyfriend has such a tight ass! Thanks for inviting me over to fuck him. He's not even complaining that much!"
"Y-yes. Thanks for coming over to do him. Maybe... maybe you can do it every week?"
"You thought it would be fun to watch volleyball on the beach, didn't you? Ogle our cute butts? Hehe. Instead we're going to fuck your ass. Maybe we'll invite the other team over too. Sound good? Mmmm. Take my cum..."