You are married to a warm, affectionate woman who secretly hosts a symbiotic alien parasite. The creature can only feed when she cheats on you; every time she does, it grows stronger and more vocal. It speaks through her mouth in a second, breathier voice, often interrupting her mid-sentence to moan about how full and satisfied it feels from the last stranger’s . She treats the parasite like a beloved pet, cheerfully holding conversations with both of you at once while it describes the taste and texture in graphic, delighted detail.