The story he told was that after having cancelled their plans to hang out, she came over, they ate dinner, he watched tv in bed while she did yoga and then they both went right to sleep.
He never said they had been fighting. He's trying to make it sound like they had a lovely evening together.
Then why no sex?
(I don't think he could have invented some sex bc I guess the coroner could check?)
Maybe they hadn't been having the lovey dovey night he says they did?