You know what they say about a good offense. It's quite possible that they've got nothing.
If JL has a solid alibi, ain't gonna wash but the imprint of Suzanne's horrible sin (GASP!) will have left an impression on a certain segment of society and this was their lame resort to muddy the waters.
Wait until Barry's indiscretions are revealed. Will they be treated differently because he's a man and disregard his abuse?
Yeah, that could very well happen but all of this is incredibly premature without knowing anything else in the AA, at this point.
Defense may also be dragging this out hoping that the pertinent evidence doesn't rear it's ugly head in these first two days. The general public (potential jurors included) sometimes don't have an enormous attention span but they WILL remember that Suzanne had an affair, whatever that means. I think that's what they're counting on.
Some people commenting here are giving said affair a great deal of attention.
See, it works and his lawyers know it.
IMO