My sister and I live together and have done for years. We’d planned to go our separate ways - her with her partner, me with a housemate. It was her decision, she pushed for it even though I wasn’t ready. It took me a while but I finally agreed. Made arrangements. My future housemate is excited… but then my sister broke up with her partner. Her own fault. I told her I can’t cancel on my friend, we were so deep into planning, nearly a year of it… I couldn’t do that to them. She’s moving back to our parents. Today I asked about next steps for put the house on the market. She told me not to rush her (I wasn’t) and that she’s got the worst of this arrangement, that she was the one losing the most, that my friend and I were benefiting from her situation… …I bit my tongue. I gave her sympathy and said we’ll take it slowly. But really… I’m so mad. This is her own fault, she pushed for this, she started the situation that led to the nasty break-up… she only has herself to blame…