Ironically, I'm currently at a meetup and being kept awake by some very loud snoring — which is how I stumbled on this thread.
I think we need to re-open this case file, sorry, as nobody has asked the obvious question: why did she lie about the music being played because it 'helps him sleep'?!
Are we even sure that guy WAS the husband? Could that be her side lover, and the REAL husband is in the basement being subjected to BTT: bagpipe techno torture (it's what the Scottish police use, apparently).