Kayleigh has said she never slept with Charlotte's ex (Adam) while he was with Charlotte though and since she and Charlotte are not friends she owes her no loyalty. It was on ex on the beach. As I said Charlotte and Adam are now friends so the fact she can forgive Adam but not Kayleigh who did nothing wrong baffles me
Also just incase its confusing Kayleigh's current boyfriend has never dated Charlotte, the tattoo Kayleigh meams was one Conrad (Kayleigh's boyfriend had done on Just The Tattoo Of Us