Current psychological theories on daily social interactions emphasize individual differences yet are underspecified regarding contextual factors. We aim to extend this research by examining how two context factors shape social interactions in daily life: how many relationships people maintain and how densely people live together. In Study 1, 307 German participants (M(age) = 39.44 years, SD(age) = 14.14) answered up to 20 experience sampling questionnaires regarding their social …