A Strange Request

You’re hanging out with your best friend Katie at her apartment. You two have been chatting and catching up, and the conversation soon turns to Katie’s new relationship. “So how are things with Brian?” you ask. “Things are going pretty good,” she replies with a smile, “he’s really sweet.” “Glad to hear it,” you respond, “but how are things in the bedroom?” you ask teasingly. Katie shifts in her seat slightly, and pauses nervously. “Well that’s actually something I wanted to talk to you about,” she says hesitantly, before continuing. “Have… have you ever heard of cuckolding before?” How do you respond?