The present study was aimed at assessing the links between shared parental care and maternal and paternal sensitivity and coparenting over the first 2 years of the child’s life. The sample consisted of 69 families who took part in the study when their child was 3, 9, and 18 months old. Sensitivity and coparenting interactions were assessed in our laboratory with situations of observation: a free play and the Lausanne Trilogue Play. The main results are that (a) maternal and paternal sensitivity increases with time but sensitivity is not linked with either maternal or paternal care; (b) coparenting support is higher when the father or the mother is engaged in care at one or two of the time points than when they are engaged at the three time points; and (c) there are interaction effects according to which support is higher in couples where both parents are engaged at the three time points. These results suggest that the interplay of maternal and paternal care has to be taken into account to understand the development of coparenting in the early family