My partner’s daughter is nearly 19, and lives with her Dad and I, although since she’s met her boyfriend, she’s only here a few times a week. My children, 5 & 10, live with us. She’s been repeatedly asked not to swear in front of them, vape around them or talk about things she shouldn’t in front of them, but this constantly falls on deaf ears. My eldest is quite an anxious little girl and StepD constantly “jokes” about dying of cancer and killing herself over every minor inconvenience. My youngest has ended up repeating swear words and inappropriate phrases in front in front of her Dad, which he’s raised as an issue with me. She called my youngest a “freak” tonight then said she was just joking and basically doesn’t understand why everyone just doesn’t lighten up. The list is endless, and we’ve previously had a sit down chat which ultimately didn’t do anything. The worst part for me is that she’s a TA at a special needs school so she manages not to swear, vape or be inappropriate all day around other people’s children, but can’t respect that I want the same for mine. I’m genuinely curious to know - am I right to be getting so annoyed?