I don't have 16 (let me know if you get it!) and 17 is literally just "Right before getting out my mum made us girls swear never, ever, to speak of this to anyone... you're the first I've spoken too.", but here is 18:
18. Parking interlude
Laura was simply rooted to her chair. Her brain was foggy, still reeling from her four orgasms in the mall!
Thankfully Mandy took the lead, "What do you say we go tuck our spoils in the car's trunk ?" She then stood up and began gathering her bags. Laura followed suit, then as Mandy was walking toward the exit she exclaimed: "Wait, I could