Kirsten is in the doghouse with Maggie for not telling her what she saw in a stitch. Cameron refused to betray Kirsten, so he’s in the doghouse too.
Barbiero was killed and his dead body was used to send a private message to Kirsten. The murderer knew Kirsten would stitch into the body. Barbiero was told things that Kirsten was meant to hear and then he was killed. He was used as a message machine.