Sin had been on her way down, looking for Delilah, when she saw the impromptu ass-whooping. Oh HELL no.
Without thinking about it, she ran over, and tackled Kayla off of Isabella, eyes wide.
"Stop it, ya crazy yahoo!" She crouched down as she hopped to her feet, finally showing some semblence of balance. "What the hell, Barnes? I may not love the idea of the lady shtuppin' my mom, but she sure as hell doesn't deserve to get her ass whupped! She's a good lady, Kayla! Like you USED to be before you decided to go all nutzoid here!"