Oh Steelers, I am sorry. Strange that I should have posted this yesterday.
"Hi Steelers, sorry the return didn't go well. I think and I really have no idea why! maybe you should DB your son a little.
I find the dynamics a little strange here with him and his father."

Please do not allow your son to be disrespectful to you.You do not deserve this. With all due respect I would also not take anything your son tells you as gospel! He obviously has his own agenda and may not be relied on for truth.
Good advice from others and I should be very careful what you say to your son. I hope this does not esculate to cause a split between the girls and your son.
I hope you find the strength to set boundaries with your son, a different set of rules should apply to him. I know you feel you cannot set boundaries with him(your H) due to it being his house and financial implications.This must be so hard,I know you said it isn,t,but take care of you anyway.
Take care.