Three adults in one home is always going to be difficult. Our daughter is home during the Christmas Holidays and summer. Towards the end of each visit, we are all ready for her to return to school. She loves it here, but she loves having her own home up at school too.
Ask your other half to back off. He should not be getting after your adult son for any reason. They should be having civil conversations.
If he cannot control his tone, what is his excuse?
Your son needs to learn to not be so emotional and to act like he would with any other adult, by requesting that the tone please be changed, or excusing himself from the conversation until he feels he is ready for the conversation.
I cannot stand a tone that sound s like a yell or is condescending. I would not respond well to that either. In our home we all use manners and show respect to each other at ALL times. We never take anyone for granted. No one tells anyone what to do, instead we each take responsibility and take care of it. If we have a problem, we just speak about it with that person, just like we would if speaking to a coworker. With respect.
Once the guys both start working, you all may need to sit down and make up a list what each of you is going to be in charge of around the house and yard.
Also make sure you all are clear on money issues.. bills, rent, food.
Each person should be cleaning your own bathrooms and bedrooms clean.The common rooms should be switched out so no one person is always responsible for all of the common areas. Laundry should be doing their own. If someone wants to ask others about whites or darks, that is up to them to offer to include them. You may need to decide what nights are their nights for the washer and dryer.
I am sending you strength.