He was devastated that she ended things.
He wasn't moved in but had been bring up their future plans regularly.
She had had a good marriage and wasn't interested in adjusting to the intense intimacy of living together with someone else.
This is all second hand of course, but the surprise and upset of the decking did the rounds.
Funnily enough her lovely neighbour had been given the impression it was a much planned surprise by him, and was very upset to learn she was upset and shocked upon her return.
No wonder her sister thought she was being played.
OP, I think you have absolutely been boiled frog emotionally abused by him, slowly, slowly, drip, drip, drip.
Undermining you.
Breaking you down.
Your conversation with colleagues etc., confirm you are not this aggressive ogre.
This is a narrative that he has created to shut you down.
This is the nature of abuse.
You aren't allowed to say a word.
He gets to mess and piss everywhere.
Please do not dismiss this as accidental.
He knows EXACTLY what he has been doing.
Don't fall for it that he is "misunderstood".
This is a man whom has been emotionally abusing you deliberately and is extremely controlling.
Abuse thrives upon secrecy.
Tell your son the truth.
Get him out.
Take careful advice.
Hand over, agree to nothing.
The house is yours.
Don't be played by thinking his forced spending on your house means you owe him anything.
He knew EXACTLY what he was doing.