Would you be pissed

So me and ex are broken up he moved out but we are planning to work it out and go see couciler we have a car together with he owe my step dad about 1600 now and he have a baby girl of 6 months ... he won’t be paying rent now as no longer lives here but if was to move back on he would need to pay this! he has just brought a car on finance I’m kinda fumin! Am I over reacting