They had been having sex more or less regularly for over three months when Catherine suggested inviting Warrick to join them in bed. Sara had said no, not because she she didn't trust or like Warrick, but because she didn't want anyone to know about her and Catherine. After a lot of persuasion she had reluctantly agreed, and they had shared some memorable moments with Warrick. Still, Sara couldn't help but feel she had been half pushed into it by Catherine, who very obviously had a thing for Warrick, and that was why, when Warrick texted her early one morning and asked if he could come and see her - only her - she didn't feel any guilt when she said yes.