I'm confused as to what your question is, and/or what we can help you with. I mean, it sounds a little awkward, but I'm not sure I understand the need to dissect it. It's possible that she mis-read her call log, that she's randomly calling numbers from his phone, or that she pulled it out of thin air, but in any case, it's between J and B. As long as she doesn't call you again, it's over and done with.
Well, I'm a bit surprised that (as yet) no one feels she was rude on several counts:
1) not identifying herself as soon as I answered instead of immediately going off on an angry rant
2) rather cold, accusaroty tone
3) no apology
If it's between them, then she shouldn't be calling others, accusing, or dragging them into it - relatives or anyone else. Most, if not all, of the sutuations people post about are "over and done with".
I also think there may be some confusion - the call from wife came from a land line to my cell phone.
Anyway, maybe it's a "you had to be there" situation, and since I'm the one who experienced it I see it differently.