I had to teach my SIL that disrespect isn’t tolerated in my house.
The next morning, I changed the Wi-Fi password; I left her laundry in the machine, damp and wrinkled, and I didn’t make her breakfast. Normally I make breakfast for everyone, but this time, I made enough for only my husband and I and put the rest away before she came out.
I also locked the guest bathroom door from the outside because she wasn’t valuing it.
The first thing she noticed was the Wi-Fi, and when she asked about it, I told her I’d give it to her after we spoke about the house rules because I’ve asked nicely for weeks and been completely disrespected in my own home.

