Repression
You know Mom's just looking out for the best interest of your sister, and you say as much. Your Mom looks a little surprised as does your sister, who then gets really angry.
"Fuck the both of you! You don't know me! You're a fucking cold hearted bitch who's wallowing in her own loneliness and you're her fucking lap dog who does everything she says!" you sister screams.
"Maybe because he actually cares about my feelings! Unlike you, you little slut!" your Mom says and then slaps her. Your sister looks like she might attempt to slap your Mom back, but your presence stops her. Instead she runs out the door, with one last comment.
"I'm leaving this fucking house of insanity! The both of you two can go straight to hell!" she says slamming the door.
Your Mom waves her hand in disgust and then turns to you.
"Thanks for taking my side. You're such a good son." She says and then hugs you, you return the gesture.
"Okay now head off to school, I have to go to work."
"Fuck the both of you! You don't know me! You're a fucking cold hearted bitch who's wallowing in her own loneliness and you're her fucking lap dog who does everything she says!" you sister screams.
"Maybe because he actually cares about my feelings! Unlike you, you little slut!" your Mom says and then slaps her. Your sister looks like she might attempt to slap your Mom back, but your presence stops her. Instead she runs out the door, with one last comment.
"I'm leaving this fucking house of insanity! The both of you two can go straight to hell!" she says slamming the door.
Your Mom waves her hand in disgust and then turns to you.
"Thanks for taking my side. You're such a good son." She says and then hugs you, you return the gesture.
"Okay now head off to school, I have to go to work."