Mom and sis help me out

I’m gonna try and make this quick. Basically I was in my room home alone scrolling on my phone when I saw a post that said ballbusting grows your penis size so I wanted to test it out. After 10 minutes of tapping my balls because u was scared I myself really hard and as soon as I do my 36 year old mom and my 18 years twin sister walk in the house. They hear me yelp and run to my room to find me holding my balls on the ground. Now ever since my dad left we’ve been really close, so we’ve joked around about stuff like this which made this even worse. The both start laughing at me and call me a loser, so I explain myself, and as soon as I explained my self and got back up to my feet I saw excitement on my sisters face I’ve never seen before. She practically begged my mom to let her crush my balls and begged me to let her too. My mom didn’t really care what she did, in fact my mom wanted to crush my balls even more than my sister dod. My mom told me to lay down on the ground and spread my legs., so I did. My sister put her foot on my balls and put all her weight into grinding my balls with her feet. My mom started laughing and then took her socks off to feel it better. She stepped on my balls and started grinding really slowly. My dick did end up growing and they still to this day tease me for it and ask me if they can crush my balls again. I tell them no but the still do every once and a while