Mom is enchanted, so you don’t have to worry. Just tell her you asked Abbie to do it.

You jump at the sound of your mom’s voice. Your brain starts scrambling to come up with an explanation, but you’re coming up completely blank for an acceptable reason your sister would be sucking your toe while you are both obviously aroused.

“OH!” Mom gasps. She stares at you for a moment. You think you notice her eyes lingering on the tent your hard-on is making in your boxers. Then she glares at Abbie. “Abigail Harris!” your mother shouts sternly. “What in the world do you think you’re doing?” Abbie flinches, but she keeps kissing and licking your foot.

Your mom yelling at Abbie spurs you out of your stunned silence. “Mom, don’t yell at Abbie. It’s not her fault. I asked her to do it.” Then you remember to say, “Abs, you can stop.” She lifts her head from your foot and gets up from all fours to her knees. She’s trembling as she wipes tears from her eyes, then tugs down on her nightshirt, trying to cover her panties.

When your mother’s attention is turned from Abbie to you, her face changes from an expression of revulsion to a look of confusion mixed with longing. “I, I’m sorry, Honey. I didn’t know that… that you wanted…” she trails off as she can’t bring herself to finish that thought out loud. She swallows and continues. “It’s OK. It’s not wrong for a man to have, um, desires that are, well, out of the ordinary.”

"You shouldn’t feel ashamed, Honey, or like you have to hide anything from me,” Mom says as she steps closer to you. “I’ll love and accept you no matter what, Davie. Nothing you want will shock me so badly that that isn’t true. I want you to know you can tell me anything that you feel you want or need.” She combs her fingers back through your hair.

You shake your head. “I’m not a foot fetishist or anything, Mom. It was just, kind of a dare,” you explain. “You know how Abbie is always teasing me, and saying and doing outrageous, sexual things to make me blush? I sort of wanted to test Abbie to see how far she would go.” You look down at your sister and smile. “It looks like she’d do just about anything to get a reaction out of me,” you chuckle and wink at Abbie.

“But, you both seemed to be, um, enjoying it,” your mother says. Her hand slips down from your hair and she starts massaging your shoulders. “It, it doesn’t bother you that, well, it could be seen as inappropriate for your sister to be doing that?” Her tone is curious, and maybe a little hopeful.

“Mom, Dave…” Abbie starts, but you cut her off.

“Abbie, don’t talk. I’ll tell Mom everything she needs to know,” you say. “I think it would be better coming from me.” You suspect that Abbie was going to tell Mom about the spell, and you’re not sure you want her to know yet. You don’t know how she would react. You are starting to accept what Abbie said, that you’re going to need to have sex with Mom, but you want to ease her into the idea.

You twist your head to look back at your mom, as she keeps rubbing your shoulders. “Abbie and I decided that what other people think is appropriate shouldn’t control what we do in private, as long as we’re not hurting anyone. Don’t you agree?” you ask her.

Her face flushes red. “That’s, it’s very open-minded,” Mom says breathily, almost panting. “I suppose you’re right, Honey. If everyone involved is a consenting adult and no one is getting hurt, it shouldn’t matter what anyone else thinks.” Her massaging fingers press harder into your shoulder muscles. “But, um, how far are you willing to go? With a close blood relative?” She licks her lips. “Something scandalous, even illegal?”

You spin in your chair to face your mother. “If people love each other, is it anybody else’s business?” you ask her.

She shakes her head slightly. “No. I suppose you’re right. It isn’t anybody's business but ours, er, yours.”

You take your mother’s hand. “I knew you’d understand. You’re the best, Mom. I love you,” you tell her. “Would you please wait downstairs for just a few minutes, while I talk to Abbie?”

Your mom brightens considerably when you tell her you love her. She nods. “If that’s what you want, Honey. I’ll see about keeping breakfast warm for you,” she says cheerfully. Her eyes linger on you as she heads to your bedroom door. Then she goes downstairs.

You offer your hand to Abbie, guide her up from her knees, and pull her into your lap. She nestles against you and sighs softly.

You stroke her hair. “I didn’t want you to tell Mom about the spell. I should probably be the one to tell her. If I decide to. I don’t know if it’s better for her to know or not,” you say keeping your voice hushed. Then you remember you told Abbie not to speak. “You can talk again.”

Abbie looks puzzled, “Why shouldn’t Mom know? I know, and it didn’t change how I feel about you. No. It made me love you even more when I realized you had the power to do that to me.” She squirmed in your lap, rubbing her thighs together. “Oh god, the power you have,” she groaned

“Wait, does that mean that you liked it? Me making you kiss my feet?” you ask confused. “But, I could see how disgusted you were. You were crying.”

“Of course I was disgusted,” Abbie grumbles. “Feet are repulsive. I hated doing that. But the fact that you could make me do it — the power you have over me — is the hottest thing I’ve ever felt.”

“OK. I’m sorry I made you do it. I won’t ask you to, ever again,” you reassure her, stroking your hand up and down her back.

She leans in and kisses the side of your neck. “You’re a sweet dummy, Beanpole,” she whispers in your ear. Her lips brush your earlobe. “Never ask me to do anything ever again. Tell me. Make me.”

It’s your turn to groan, “Ohhh, fuuuuck.” You rock your hips, grinding your hard shaft against your sister’s ass cheek. You look at your clock and see that you should be getting ready to leave to catch the school bus. Then you realize that Mom won’t mind if you skip school today. But you did tell her you’d be downstairs to talk to her in a few minutes, so you hold off starting anything with Abbie right now.

“I need to go talk to Mom,” you sigh, thinking about how awkward it will be having to fuck your own mother. On the other hand, you realize that you got used to fucking your sister pretty quickly, and now it’s great. “Abs, tell me, are you happier now, or when you didn’t know about the spell?”

Abbie nuzzles against the side of your neck as she takes a moment to consider. “It’s hard to say. It’s a major fantasy of mine being controlled, so knowing you have me magically enslaved is a huge turn-on. It was very romantic when I thought we were just naturally falling in love, and lust, with each other though.”

“I don’t know if Mom has your submissive fantasies though. It might be easier for her if I keep the romance,” you say. “Besides, it would be kind of embarrassing to explain to Mom that I was fantasizing about using magic to make a girl my sex ****.”

Abbie snorts, “Mom is your sex **** now. You’d better get over any embarrassment about admitting that you wanted one.”

You nod, sigh, and slide Abbie off your lap. “Stay up here for a while,” you tell her as you get up. “I should probably talk to Mom alone first.”

“You need to do more than talk, Stretch,” Abbie reminds you.

You just nod to that and head downstairs.