Mr and Mrs Bellic
Is a mission given by Roman. Is the only one to happen in both endings. In this mission you go to Roman's wedding with or with out Kate depending on your choice in Revenge or deal. In deal you don't pick up Kate and Roman dies at his wedding by an one of Dimtiri's men. In the Revenge one you pick up Kate and she is killed by Pegorino in revenge for killing Dimtiri.