Episode 8 showed us how SICK Yelena is
Jelena probably fed Terrence the oxymetha---whatever. It seems very strange to me that she never really answered his question about if she has concerns about HIM moving rather than losing the status that goes with being with him. Does she love him?
Jelena's character in all needs more depth to understand why she is this mean to everyone except Raquel. Maybe she's just that way!