MIL vs my own mom

My MIL has been living with us for a month.  She is so amazing, I come home and dinner is ready, she never gives me her opinion or advice or interferes in any way, it's awesome having her with us.

My parents are teachers on Spring Break this week, so MIL went home and they are staying with us for the week.

After one day I'm about to scream at my own mom, who is bipolar and crazy.  For the love of God, her diaper does not need to be changed AGAIN!  You just changed it 30 minutes ago!  She freaks out every time Allie makes any sound.  "She needs a diaper change!"  NO she doesn't.  Leave her alone.  I told you a thousand times that the only time she fusses is because she's hungry.  She's going through 12-15 diapers a day, how is that even possible!

She also threw away the expensive chocolate bunny that I got my dad for easter because she's on a diet and she didn't want to be tempted to eat it, she bought Allie about $300 worth of pink clothes (more outfits than there are even enough days to wear), about 10 easter bunnies, a huge hanging sign that says "Gone to the Beach" because we might be going to the beach for a week in June...she's the queen of spending and wasting money, my dad estimates about $2,000/month on things she has nothing to show for.

It's going to be a long week.  Can't wait till MIL comes back!