Nice and promising start!
I like that both sisters in law have different looks and personalities, and also that the older one already has a kid. Makes a nice change from having them being virgins!
Two small comments:
* Some conversations/jokes seem to be a bit too drawn out for my taste. For example the throwing water on the witch thing, that just kept coming back and back.
* You might want to look into a more distinctive way to show the characters' thoughts than putting 'Thinking' in front. Maybe make the text italic in those instances?
Looking forward to what comes next!