Codka la wadaago

AITA if I don't let my sister move back in with me? My sister (23f) has lived with my husband, toddler, and me (33f) every summer she was in college. We didn’t charge rent and covered everything. She eats a ton and uses a lot of water, so it cost us about $2,000 each summer. After graduating, she moved back in with my parents in our tiny hometown (population 600), about 15 hours away. She lived there jobless and expense free for 8 months, then got a job 10 minutes from my house (she says it’s