Well this is outing but fuck it. I don't care. I'll never not be mad about it.
A family member (through marriage) was watching my DS while I went shopping. I made a mental note to get toilet paper as we were out. Get back and DS proudly declares FM had done a smelly poo. I was slightly puzzled because I knew we didn't have toilet paper but figured they'd sacrificed a sock. When they left I discovered a missing hand towel!
Okay, so in desperation I can see why someone would use a hand towel, whatever. I figured must be in the bin or washing machine, or they'd smuggled it out in their bag. Nope. They'd flung it in my cupboard under the stairs! WTF!
I put gloves on and placed said towel in a plastic bag. Next time FM was over to watch my son so I could shop I placed the bag with the shitty towel in ON TOP of my bin with the bag open so they would know I know. Very passive aggressive I know. Anyway I get back and FM loudly announces "Oh there was a shitty towel on the bin, DS had left it there so I've flung it in the wash" ... !!! DS says "NO I DIDN'T" to which FM again says it was DS. I was, possibly for the first time in my life, fucking speechless.
I told FM's partner about it and how hurt I was and that I didn't want them in my home alone ever again. FMs partner was mortified obviously. I've never raised it with FM (now divorced from family anyway) but it's something that really hurt me, possibly more than it made me mad, to disrespect my home in the most disgusting way and then to top it off blame my DS was just something else completely.