“Usually urgent love making. Walt said the meth game made him feel alive but so did Skylar as his wife and sometimes nemesis.”
I don’t think so. When they made love urgently, it was always Heisenberg, still high on his thrill from committing criminal acts (or having the whole school wondering about him while he is right under their nose). Clearly, before that, their love life was more humdrum, because Skylar is taken aback at his behavior the first time it happens, saying he was acting like a different person.
It was his Uncertainty Principle that really thrilled him in criminal acts. He was always uncertain whether the law would catch him or not.