Link to part 5: https://www.reddit.com/r/sexstories/s/UNxojV6yQt

Now get inside hand me the keys and strip down naked, please.

Kim did as she was told, and handed Melanie the key to her chastity cage. And got naked in front of the ladies. Shall I get on my knees, Melanie?

Yes, that's a great idea. And for tonight you should address me as Mistress Melanie and he as Mistress Mia. Is that understood, slave?

Kim had no idea what was about to happen, but she put all her trust in her best friend who supported her during the past few months.

I said, is that understood?

Kim: yes Mistress Melanie. Melanie: good girl, now crawl over here and start licking my heels, I want them to shine.

Mia: Melanie has told me all about you. How you were a dumb boy when you got to this university, to the obedient little slut you are now. You are a little slut, aren't you?

Kim: yes Mistress Mia, I am a little slut! Mia: perfect. I got just the right toys for little sluts like you.

She opened a leather suitcase and pulled out tons of sex toys, whips and other bandage equipment.

Kim was still licking Melanie's heels, face down ass up in the air. She then noticed her ass was getting moist. Mia was putting lube on it and fingered her so she got nice and loose.

Kim was moaning while she got fingered. She gasped for air. She got slapped in the face. Melanie: did I tell you to stop licking slave? You better start again or you will be punished. While Melanie said that, Mia already hit Kim with a whip on her ass. Without making any sound she started licking the heels again.

Melanie: Mia why don't you make yourself comfortable on the bed? Good slave those heels look nice and shiny. Now I want you to crawl over to Mistress Mia, and start licking her cunt.

Mia: moaning... yeah that's it slut, keep going. Melanie got behind Kim and inserted a 4-inch vibrating buttplug inside her ass. This kept on going for about 10 minutes. During those 10 minutes, Melanie put on a strap-on dildo, a black girthy 8-inch long dildo.

Melanie: Get over here slave, I want you on the bed on all fours. Melanie stood behind her, removed the still vibrating buttplug. Reapplied lube to her asshole and inserted the big dildo. Slow trusts first then upped the pace.

Mia joined the 2 girls, she was also wearing a strap-on dildo and she got to Kim's face. Open wide slut. The cock was inserted in Kim's mouth and she was slowly face fucked. The dildo went balls deep inside her mouth. She wasn't even gagging.

Mia: my god she is a real slut, she is not even gagging on my cock! Melanie: I had her practice daily since she moved in with me. I'm so proud of her. Always told her to practice daily so she could potentially be someone's girlfriend.

Mia: let's switch positions, have her taste her assjuices. Melanie: Good thinking Mistress Mia. And she gave her a little wink.

Mia had more experience as a Mistress, she taught Melanie some things to spice up any relationship. She was excited when Melanie asked her to help her out with the roommate situation.

The girls switched positions, Mias' cock was already penetrating Kim's ass.

Melanie: we are doing this for your own good. We want you to experience this yourself so you can make the right decision for your future. She gave Kim a sensual kiss and grabbed her boobies. Pinched her nipples.

Kim: thank you, Mistress Melanie. She then started sucking on the dildo. Tasting her juices. She was enjoying herself. Her locked clitty started dripping precum.

Mia: looks like someone is enjoying getting fucked in both holes. And she stuffed the cock as deep as possible. She then took hold of Kim's cage and squeezed her balls so more precum dripped in the palm of her hand.

She showed Melanie her hand full of precum and told her: this is an excellent replacement for lube. Remember that!

She poured the precum inside Kim's gapping asshole and continued to fuck her with her precum as lube.

Melanie removed the strap-on and grabbed Kim's head and told her to get her off. I want you to give me an orgasm slave! The three girls simultaneously had waves of orgasms. Pure lust and pleasure filled the room.

Melanie: Now that you have experienced pleasure from both male and female, you have a choice to make. Are you going to be a lovely wife to a male or female?

Mia: or you could be both, but have us occasionally fuck you with a dildo.

Melanie: hehe, we could always invite Eric over for a threesome, she winked at Kim.

Kim: do I have to decide right now? She looked at Mistress Melania and Mia.

Both Mistresses: not right now, but let us know in time sweetheart.

Kim: Thank you both for this beautiful evening.

Both Mistresses: You are very welcome slave girl.

Mia left the two alone and went home. Melanie hopped into the shower to freshen up before going to bed.

Kim entered the bathroom, do you mind me joining you in the shower? Melanie: no not at all, I actually prefer showering together. The girls cuddled and kissed each other. Kim: I think I've fallen for you! Melanie: I love you too Kim

The two girls got into bed and talked a little. Melanie: I'm proud of what you did tonight. Headmistress Victoria wasn't so confident that you would go through with all of it. That's when I made her a little bet. A bet regarding your future. Kim: what kind of bet? Melanie: if you were to go with Eric and have sex with him, then Miss Victoria would pay for your entire transition to full womanhood. Kim was shocked... so I can finally be the real me? Yes sweetie, you can!

In 2 weeks you and I have a trip planned to Thailand. We will first enjoy a week's vacation and during that week you can decide whatever surgery you want.

Kim: thank you, Melanie, I don't know what I would do without you. You've put so much trust in me, and so much time and effort to make me the best version of myself. I don't ever wanna find out what I would do without you. I want to ask you something. Melanie: You can ask me anything, honey. Kim: would you be my girlfriend? I am deeply in love with you!

I would be honored to be your girlfriend. She kissed Kim and snuggled closer to her. Now let's get some sleep, tomorrow we should go shopping, we need new bikinis for our trip to Thailand.

More to come in part 7.