Today my step-dad surprised me with an early birthday gift. When I opened the huge box my eyes lit up and my panties got wet. He got me my very own fuck saddle! I told him a few weeks ago how bad I wanted one. I was so excited! I really wanted to show him how thankful I was for my gift, so I offered to let him watch while I try it out for the first time. We waited until my mom went to work and set it up in the barn. I stripped down while he put on the clit tickler attachment for me. He was stroking his cock and watching while his nasty phonesex slut step-daughter got wild bouncing and grinding down on that vibrator. I was grinding and riding so hard that the entire saddle was already soaking wet before I ever even turned it up. My step dad was so turned on that he was begging to fuck me but I told him no because I wanted to play with my new toy. Instead I sucked his hard dick while he held the remote and teased my soaked pussy by turning it up and down.