Not in the slightest

Grace made no comments or reaction about the fact that her daughter was standing in front of you both without a single shred of clothing on her.

“Is something the matter?” she asked, as you had stopped telling her about your phone.

“No, sorry I just thought I heard something” you said, trying to take your eyes off your naked girlfriend. You carried on explaining a revised version of yesterday's events where you were able to convince Mom to let you have a phone without saying that Emma was the one who ‘supposedly’ gave you it. Grace nodded along and had no issues giving you her number.

All the while Emma was waving her arms and talking to herself as she got increasingly more excited that her Mom wasn't able to see her. She even started making poses to try and distract you as Grace read out her number for you to add to your phone. The one that caused you the most grief was when she leaned forward behind her mom and made a miming motion of her pretending to give a blowjob with an open mouth. With her posture, her tits swayed back and forth in time with her strokes and you couldn't help but widen your eyes at the scene.

Emma burst out laughing at your response and you had to double-check with Grace to make sure you had got the right numbers. With the number now correct, you didn't really have anything else to discuss with Grace.

“Right, I'm gonna go. My Mom will probably be getting annoyed that I’m not back by now” you joked getting up from the couch. “If you do think of anything about what I asked earlier then I’m fine with you calling or texting. Whichever you prefer.”

“Will do. Tell Lucy I said hi” Grace replied with a smile as she watched you leave the room. Emma seemed intrigued by your hints about a previous conversation but you tried to keep it vague enough for her not to figure anything out. You went out into the corridor and Emma followed behind you but with Grace being so close you couldn't risk having an extended goodbye. Instead, you silently waved her goodbye and before she could wave in response you opened the front door wide open.

At first, Emma stood there and waved before it dawned on her that ‘subjects’ were the only ones who couldn't see her and everyone else in the world could see her plain as day. With a squeal, she darted to the staircase and poke her head back around so nobody could see her if they looked in. You had made sure nobody was in front of the house before you opened it so you just smiled at her predicament and considered it payback for the taunting she had given you earlier.

You left with a smile on your face but the reality of going back home filled you with a slight feeling of dread as you dragged your feet to the door. There was no point delaying the inevitable anymore but if it would have been socially acceptable to sneak right back to Emma’s you would have. Fishing the key out of your pocket, you unlocked the door and headed inside.

The sounds of the TV could be heard from the living room but other than that there wasn't much you could hear. No immediate interrogation was **** upon you and nobody was waiting for you like some sort of intervention so you assumed the coast was clear for now. With your shoes now off, you walked further into the house and saw that Sarah was the one watching TV on the sofa. With a sigh of relief, you walked into the room and settled down in the seat next to her. You could hear the sounds of someone further into the house but you felt more confident now that Sarah was here with you.

“Where’d you sneak off to? I went to meet you after… this morning and couldn't find you” Sarah asked as she flicked through the channels with the remote.

“Ah sorry, Emma wanted me to help her with her english project so I went round early. Didn’t want Mom shouting at me if I ended up delaying the trip to the movies.” you replied before deciding to ask some questions of your own. “She hasn't been searching for me has she?”

“Not that I know off. Lucy was though. She came down here earlier asking for you but she didn't say why so you’ll have to ask her yourself” Sarah said, not taking her eyes off the TV.

A lump formed in your throat as you talked to her. With Lucy supposedly looking for you there was no longer a doubt in your mind that she knew about the panties and with it only being a matter of time before she spotted you, you needed to think of some precautions. One obvious one you could think of was luckily sitting right next to you.

“Actually I’ve got a favour to ask regarding Lucy if that's okay?” you asked hoping she would help. For the first time since you came back into the house, Sarah turned towards you to look you in the eye.

“I still haven’t got my reward from the last favour I helped you with” she replied, referring to her earlier help with your plan to convince Mom about you both getting phones.

“Oh come one. You’ll be getting that in a matter of hours anyway. I promise if you help me with this then I’ll make it up to you” you bargained

“...Fine. Go on spit it out” she sighed, waiting for you to reveal the favour.

“Well, you see…about that. I think Lucy believes that I’ve been stealing your underwear and using them to masturbate with…” you quietly answered, partly to avoid anyone else hearing and partly out of shame.

“And, I don't see how I can help with that?” she replied, tilting her head at you with a confused look.

“I was sorta hoping that, if she asks me about the underwear, then I could say you had given them to me in the first place. Which is technically true considering you helped me finish in them in the first place” you responded.

“No! No way are you telling her about what I’ve been doing with you” she declared, starting to raise her voice before quieting herself down.

“I’m not planning on telling her but I need an alibi just in case she comes to the wrong conclusion”

“She isn’t gonna come to the wrong conclusion if you just say you stole them, is she? She’ll just think you're a pervert who steals his sister's panties” she argued back.

You hadn't expected her to reject this strongly with how casual she was recently with you using her but it seemed that she was still set on keeping this from Lucy and Mom so your argument wasn’t as solid as you had believed it would be. Sarah’s expression told you that this wasn’t a point you could convince her on but you felt like you at least had to try. You tried to think of another angle for your case and were about to start talking when Mom walked into the living room and towards the two of you.

“Why are you both still watching TV? You should be upstairs getting ready, not lounging around down here” she announced.

“But I..” you attempted to reply.

“No buts.” she replied with a stern look, grabbing the remote from Sarah and turning off the TV.

You stared at her in an attempt to get her to back down but with Sarah in the room, she wasn't backing down like she would have if she’d been alone. Sarah huffed and got up before heading to the stairs and you no longer had a reason to stay on the couch. Mom paced out of the room leaving you on your own so you followed your sister upstairs. She seemed to sense you were behind her and rushed to her room before slamming the door in your face to avoid a repeat of the previous question.

You knocked your fist against the door a couple of times in an attempt to get her to open up but it was clear that she wasn't coming out any time soon.

With you chasing after Sarah and the louder noise than usual, you didn't notice that someone had snuck up on you before it was too late.

“I think we need to have a talk, don't you?” Lucy announced, placing a hand on your shoulder with an iron-like grip.