Momo, a lustful wife unsatisfied with her sexless marriage, gets invited for a swap by her former OL senior and his equally promiscuous husband. While having an ex-boss's massive cock in her mouth, her husband is called away on the phone, leaving her alone with the ex-boss. However, her husband arrives unexpectedly, and she finds herself climaxing in ecstasy as they watch her have sex with another man. She's intoxicated by the pleasure of having her pussy pounded by a stranger's cock while simultaneously sucking on her aroused husband's.