We build on the emerging adulthood literature to examine two forms of relationship instability, reconciliations and sex with an ex; we term these forms of relationship churning. Analyzing recent data on emerging adult daters and cohabitors (n = 792), we find that nearly half report a reconciliation (a breakup followed by reunion) and over half of those who break up continue a sexual relationship (sex with an ex). We analyze individual demographic, social psychological, and relationship factors associated with reconciliations and sex with an ex. These findings showcase that emerging adult relationships are characterized by considerable uncertainty and add to our theoretical and empirical understanding of stability in romantic relationships in emerging adulthood. (Contains 5 notes and 2 tables.)