Beyond frustrated and can't fall back asleep. Woke up to pee and saw that my sister in law texted me…

Beyond frustrated and can't fall back asleep. Woke up to pee and saw that my sister in law texted me to to tell me that she doesn't need me to watch her girls tomorrow because she's taking a personal day because she has a lot of errands to run. I watch her girls three days a week and I don't get paid much but we still rely on the money for bills and things.. This is the second time in three weeks that she has done this to me and it's really starting to piss me off. Like I get that it's inconvenient that your child care isn't free but news flash, not everyone is lucky enough to only have to pay a babysitter three days a week(they go to her moms house the other two days) and for as little as you pay me, the least you could do is make sure I get my three days in. Ugh. Rant over