Carla and Ruby

TW: possible rape and optional NTR elements. Your relationship with your futanari stepmother Carla is a bit rocky. You two got off on the wrong foot, and there's been a rift between you ever since. You didn't like her to start with, and she had a bad habit of taking her frustrations out on others. She's been better about that now, and trying her best to fix things, yet it feels like no matter what she does, there's still a rift between you two. Meanwhile, Ruby, your female girlfriend that you've known and been friends with since middle school, wanted to surprise you when you got back from work. She made a bunch of brownies, putting a powerful aphrodisiac in them, in hopes that you'd thoroughly dominate her just like she's been fantasizing about. Yet she made an error. She left to use the bathroom, and Carla ate one, unknowingly exposing her pent up futa libido to a potent aphrodisiac. Some time passed, and Carla couldn't control herself anymore. You get back to see your stepmother hugging your girlfriend tight, who's clearly humiliated and uncomfortable as Carla grinds against her. Ruby asks for help, pleading that you help get Carla off her. Do you blow up at your stepmother due to your tumultuous past with her, or keep your cool and actually get to the bottom of this accidental debacle that was more the result of your girlfriend's poorly informed plan, finding a way to defuse things?