After substantial searching on all sorts of dating sites and apps, you and your girlfriend have finally found the unicorn third to your relationship. She seems to be willing to fuck around and have fun with you both, so you meet up with Her alone, looking to vet Her. She tells you that at first, She'd feel more comfortable just playing with your girlfriend while you watch. She goes into detail, describing all of the dirty things She wants to do to your hot big titty GF. When She notices that you're getting turned on thinking about seeing them together, She instructs you to pull out your cock to start jerking off for Her. Your girlfriend doesn't need to find out about how She pulls Her tits out for you to stroke to, impressed by your size. She keeps going, telling you all about how She wants to fuck your girlfriend, even mentioning bringing a strap on to fuck Her with. When the three of you meet up and get together, it's sure to be a sexy lesbian hookup that you'll enjoy being witness to, even if you don't get to participate, at first.