Even if PF testifies, I don't think we'll ever know the whole truth. Even if we did, we might not recognize it, because so much of what they did just makes no sense.
I would be curious to know what notes PF took at the first hearing. If he doesn't testify, I guess we'll have to try to guess what he was questioning/challenging by the questions the defense asks.
That said, in a trial like this, what is the point of nitpicking small stuff if you are clearly guilty of the main crime? I'd really like to hear PF's version of events from start to finish. He must have given LE some kind of story once they exposed his the first lies about his whereabouts on Thanksgiving Day. Or did he just clam up and refuse to talk to them after that?
When KK found out about KB and the baby, she bought baby clothes and confronted PF about Baby K, product of a relationship she knew nothing about. It seemed a slightly catty female thing to do - don't confront him, just act like "oh, heard you had a baby you didn't tell me about, how sweet, here's some presents". IIRC, at that time, she said he was angry and wouldn't talk - presumably because he didn't want to admit he'd been seeing two women at the same time.
Unfortunately, at some point he did start discussing KB and Baby K with KK, probably once he realized she wasn't going to dump him after finding out he'd been seeing another woman and fathering a child behind her back. That's when he probably realized just how far KK might go to try to hang on to him.
imho!