I'm not too sure about that. We're hearing he professed his love to her countless times and in one conversation, after 12/24, promised he would change his schedule to spend more time with her. The fact that he left gifts for her, as well as her child (or children?) in the park, tells me there was much more to it.
As I said earlier, I don't believe he had numerous affairs and believe it's a ploy Geragos/Peterson family is using to disprove the motive. BTW is anyone else disgusted to see Johnnie Cochran appearing on LKL to give his point of view?