People will hear what they WANT to hear when it comes to making mischief for others.
Fancy storing up some silly conversations over the months,,like JM did,,,then use them as ammunition at a later date. Would you not have thought that from the beginning of their relationship that if JM had spotted something not quite right,,,that she'd have gone straight to the police.?
It's because JM knew that Jeremy wasn't serious about the things he'd said. He said them just for something to say because he was still wet behind the ears,,,,and didn't think about any implications.
Anyone planning such carnage wouldn't say a word,,,least of all to a girlfriend with a loose tongue.