question about the episode where Dinah shoots Hart?

I remember seeing that happen when it originally aired. I was in 5th grade at the time, and was getting ready to go to a sleepover when I was watching this with my mom. However, the events in that episode prior to the shooting are a bit of a blur to me. My question is how did Dinah end up at Hart's farmhouse in the first place? The episode doesn't seem to be on youtube, but there are a few clips with the shooting and Cassie trying to get the truth out about Dinah's deceased baby's true paternity. Did Cassie ask her over for the big confrontation about the baby's true paternity or did Dinah go over there herself? This thought just randomly came up.

I love Jesus Christ and am 100% proud!