A nesting partner is a term used in polyamorous relationships to describe a romantic or sexual partner with whom one lives. This partner can be married or unmarried, share finances, and even raise children together. The term "nesting" refers to the idea that the couple is the center of the relationship universe, and the outside relationships are satellites revolving around that relationship. The concept of nesting partners is not new, but the term itself has gained popularity in recent years. Nesting partners can be contrasted with satellite partners, who have emotional and physical distance from the nest. It is important to note that having a nesting partner does not necessarily mean that this partner is the primary partner. In some cases, the term "nesting partner" is used interchangeably with "primary partner," but this is not always the case. Some polyamorous people may choose to have multiple nesting partners, and the intimacy between nesting partners can vary.