Voluptuous Venus
Your sister and I have ordered a chastity belt for you... It will come in the mail the next couple of days...
I will be the one to put it on you weekly...
You will come over to my house every Monday before work and every Friday after work... On Mondays the chastity device will go on and will remain on for the remainder of the week... On Fridays you will come back over after work... And I will remove the device, have another little teasing session, and you will be allowed to go home for the weekend without the device on... However, should you cum with me during our little teasing session... you will have to wear the chastity belt for the weekend as well...
If you do not obey these commands, your sister and I will blackmail you; ruining your relationship with your amazing girlfriend / wife to be. Also should you not preform to my expectations I have a valid amount of evidence now to get you fired from your job... You may not know this, but my dad just happens to be your boss...
*giggles*
This is quite a predicament you have just fell into...