Just need to vent

The father of my kids ( 18 month old and pregnant with my second) just told me that I treat my 18 month old different then his 7 year old because I told her to go brush her teeth. The 7 year old don’t eat in the morning and my 18 month old does and she hasn’t ate yet this morning. Father said they need to brush there teeth at the same time and do everything together basically and I said they don’t have to do everything together always! They have quite a big age gap. But this morning he said I make her feel like a step child and I play favorites because of this!!! It’s made me so mad I haven’t even been around him since he said it!! I don’t even want to be with him anymore! It might be me overreacting or whatever but I literally do EVERYTHING!!! For these kids all of them he don’t do nothing! How would y’all feel…..