Step daughter and I Again

After catching and then watching me a few weeks ago, Monica and I were waiting for an opportunity to do it again, but schedules just weren't allowing it. Finally, last weekend, my wife worked, Monica was off work, and her brother was also working at his new job he just got. We decided to "re-enact" what had happened a few weeks ago, so once I was the only one home at about 8am, I sent her a text that said "all clear". I was laying on my bed naked, and had lubed up my cock again so it would be nice and hard when she "caught" me. I also had a little bullet vibrator that my wife and I like to use, and was using it on my balls as I stroked.  About 5 minutes later I heard the back door open, and Monica appeared in the doorway as before.This time there was no awkward stopping though, and I smiled at her and kept rubbing my cock and balls. She smiled back and came and sat on the bed next to me, her eyes never leaving my cock. She was reaching into her purse and said "I have a surprise for you".  My mind raced, and once again I wondered how far this could go and how far it should go.  In our texts the last few weeks I had admitted to her that I'd used her panties in the past to jerk off.  Sure enough, what was she pulling out of her purse? A nice sexy pair of her undies!  She said "here, I want you to show me how you used to jerk off with them". I took them from her, and right away noticed they had been worn and the crotch had a slight crustiness to it. It was then that she seemed to notice the bullet vibe I was using. "What's that?"  I told her it felt good and that her mom and I often used it, and that her mom loved it on her clit. She asked me to hand it to her and I did. She stood and told me we still can't touch each other, but she was wanting to do more than we had.  With that she undid her tight jeans and slid them off along with her panties.  For the first time my question I'd always wondered was answered.  I finally saw that her pussy was shaved clean, and oh my god it looked wonderful. She then took off her sweatshirt she had on, and I think I was shaking as she then freed her nice grapefruit sized tits from her bra. She picked up the vibe off the bed and put it up to my mouth. I took it in my mouth and got it slippery and wet, and she then took it and rubbed it over her smooth slit, making it glisten with my saliva. She then laid on the bed, opposite direction of me, and spread her legs so I had a perfect view of her pussy.  I'll never forget seeing her slide her fingers down and open up her pussy lips for me for the first time. Her pussy is beautiful! Of course I had not stopped stroking my cock and there was precum all over the head. She noticed, and licked her lips and said "mmmm, looks so good". She slid her middle finger deep inside herself, and then said to me "OK, I brought you those panties, I want you to play with them like you used to with the ones you borrowed from me, except this time you can cum in them". I had told her how I had enjoyed them in the past but never came on them for fear of her noticing. I grabbed them and stood up beside the bed. I think she was wondering what I was doing, but smiled when she realized I was putting them on.  I told her I used to do this first, because it felt so good having my cock right next to where her cunt had been.  She moaned and slid another finger into her pussy, which was now shiny with her beautiful juices. I rubbed my cock through the fabric a bit, then took them off and got back on the bed. My cock was still slippery from the lube I was using. I put a little more onto it, and then began stroking myself with her panties. Again, I'd never been able to do it like this before, for fear of messing them up, but now it didn't matter. I watched as she took the same vibrator her mom used, and held it against her clit, while finger fucking herself now with 3 fingers inside. She was moaning and started talking dirty, stuff like "oh fuck I want to see you cum in my panties", and "I can't believe I'm fucking myself with my mom's sex toy!". Monica's hips were now undulating, and I knew she was close. I couldn't take it any more, and began shooting my cum. The first shot hit my belly, but the rest oozed into her panties and I came what seemed like more than I had in a long time. I could see her hungrily watching that, and that drove her over the edge too. She screamed as she came and though I wouldn't call it "squirting", I could see more juices run out of her pussy as she continued fucking it with her three fingers. Her orgasm finally subsided, and we both lay there satisfied and smiling at one another.  I was spent, but she put each of her fingers that was in her pussy in her mouth and seductively cleaned them off of her juices. She then asked if she could see the panties, so I handed them to her. She unbunched them, examining the cum I'd put into them. Next she shocked me by taking them and rubbing the cum off them onto her tits! Holy fuck was it hot! I wondered if she was going to lick it, but she didn't.  She just rubbed it and massaged it all into her tits until it was all gone. You can imagine how much I now wanted to lick her tits with those hard, cum moistened nipples, but I kept to our agreement of not touching. We talked for a bit, and agreed we should play like this more, but both agreed we must never ever touch one another. An hour or so later, she had to go, and as she started to put her panties on, she stopped, removed them, and tossed them to me, saying "here, a souvenir, and maybe you can play with them for me before we get together again next time".  She then took the ones I had cum in earlier, and slipped them on.  My jaw dropped, and I could even feel my cock getting hard again. However, that would have to wait. She slipped her jeans back on, followed by her bra and top.  I walked with her to the living room and said goodbye, staying away from the window as I was still stark naked!  I went back to my bed and spent the next couple of hours playing some more, ending with another, albeit smaller, load into the panties she'd left me.  I've used them a few more times this past week, and I think she'll be happy with how much cum I've added to them.  I'll show her tomorrow, when we're planning to get together to play again.