Hiding shitty diapers because she leaves me with the baby, iin?

My older sister is twenty and dumb as a box of rocks. Everything she has was given to her by men that like her for some reason or my parents. Last year she says her boyfriend goofed and forgot the rubber and now she's stuck with the baby.

Every time I come over to fix something in her apartment she sneaks out with her friends to party and leaves me with the little monster. She does this pretty often but my Mom insists I keep fixing her place up and I love my Mom. So now when I go over there in the evening after work, she pulls that shit so I have been leaving shitty diapers in her closet, in the pan holder under the stove that I fixed but she doesn't use, in her old gucci purses she puts on the wall shelves I installed, even under the seats in her car. The cushions of the couch, and in the coffee table, hell I'm running out of ideas. She's smelling it and complaining about it but she can't figure out what it is. I think she must have spent half her welfare check on air fresheners this month.

Does anyone else do this for shits and giggles?