Why Did My Sister-in-Law Delete Me on Facebook?

Okay so this really pisses me off. My Brother got married in December and so far I had liked his wife. Then she posted a status on Facebook about something that I knew was directed towards me and my fiancée and the things we post. I got really offended. But my fiancée tried to tell me it wasn't about us. Then she calls today wanting to plan a baby shower for us and has offered to watch my Daughter if we need it when we have our baby. Well then I see she has deleted me from Facebook. Witch really pisses me off. She plays nice around my family but calls me trashy on Facebook. Maybe it's the hormones but I'm pissed off. 😡