Yeah, it was on a plate, under the sink. My son opened the cabinet, took out the plate, and handed it to my husband. I was standing right there. My son ran off to play and my husband and I just stood there staring at each other with our mouths open. When his sister walked in and he asked what the fuck, she said they left it there because my nephew never gets into the cabinet! He was 2! Come on now. If they're not locked, a 2-year-old is getting in.
We didn't even talk to her for six months after that. My mother-in-law is very much in denial about the situation, which is why she's always begging my husband not to do anything. She's also afraid of my nephews ending up in foster care, but they try to place them with family first, and I would take them in.
So we've made it a policy that neither of our children will ever be in that house without one or both of us there with them, i.e. no sleepovers with their cousins. The boys can come here if they want.