OK Sorry i was just reading through a couple of pages, i absolutely love the glitter bomb idea, if id of got that in time i could have set about reinacting art attack and making one.
As expected though yep she snooped, didnt even doubt her doing it to be honest, so she saw the papers in my side whilst putting ds to bed i guess.
She then went into the back bedroom which i use as my office when i work from home ( i know she went in there as i'd re-visited my 12 year old ghostbusting self and put talc on the carpet so i saw her shoe marks 
- is this just a tad too sad!!).
I dont know in which order she went but when we got in i could hardly contain myself walking through the door, she was sat very quietly on the couch, whilst i went to check on ds, dp rang her a taxi, she hardly said 2 words to us whilst waiting for the cab - it was then i knew she knew as normally i cant shut her up about what i was doing wrong somewere in my life. She did at 1 point tell me i looked like i had lost weight, then almost instantly told me it was probably those spanx things i buy, realised later she knew this as id left a pair on top in my underwear drawer [grim face].
To be honest i was a bit dissapointed with her reaction but thought well at least it may stop her snooping now. So fast forward to this morning and dp tells me while i was upstairs last night his mum was telling him how handy it was for her to live so close that she could come and babysit and had we ever thought of moving away. he just told her no and acted dumb - obviously would as he had no clue - so he asked why she would think that and had i ever mentioned moving away to her, i said no and also played dumb with him.
Then i also get a phone call off dp's uncle (mil's brother) who never ever calls, let alone at half 8 on a sunday morning asking can he come round later to see ds, i said yes well be in all day so call whenever, he said hed be up within the next hour or so. - To me this says it all, after ds was born we asked her politely not to smoke a few hours before visiting him in intensive care, instead she got really drunk, slagged us off to all her family saying she wasnt allowed to see the baby and sent her brother around to have a word with us. I guarantee this is what he is coming for, i would put money on it!
So i will update after he has been, its so nice being able to sit here on the moral highground and if thats what it is, being able to say well how would she know that if she wasnt going through our things.
p.s. I am saving the glitter bomb, and broken drawer for next time, i also have a cousin who works in a bank so will ask if she can get me 1 or 2 of those blue things.
The image of a blue glittery mil greeting us at the door will torture me until i do it! 