Ultimate shoulder rides

I found another story about riding in the net,if this is not allowed here just delete it.
                                                  My  Little  Pony
I'm 36 y.o. mom of 9 y.o. daughter,who have two best friends:a boy her age,and a girl 2 years older.Once,when i went to their room,i saw girls riding on boy as on horsie both together,i said something like ''wow,Dennis,you're so strong'',''Yes,he is''- responded girls,''probably he can carry you too'',''i'm not sure,what do you think Dennis?''-i asked,''of course i can''-he answered-''you're lighter than they are''.''Let's give a try,we wanna see it''-girls giggled as they dismounted from him,''of course i was a bit of  confused,as that
certainly not something expected from adult woman,but on other hand i was curious if he really can carry me and girls egged me saying''common,ride him'',''your turn Mrs.Allen''-said Dennis,so i straddle his back, sat on him and raise my feet,he carry me a bit faster than girls,no wonder as i'm weighted 30-40 pounds less than girls.So he carry me for about 15 minutes.They asks me if I likes it'',''yes,it's was funny''-i confessed,''so,let's play with us''-they all,even Dennis suggested, i ask them to promise me don't talk anybody about this,so i rides on him 5-6 times more by turn with girls about 10-15 minutes each time