Mom's girlfriend has a fat cock

When I was a teenager, my mother got remarried...to a woman. At first it was odd, because their roles in the relationship were so clear. My mother was the "bottom", and Jamie was the "top". They're great to each other, and I have grown to love Jamie unconditionally. I'm eighteen now, and for the last three years, I've had the awkward privilege of listening to Jamie and my mother have sex. My room is right above theirs, and trust me...I can hear that action loud and clear. When they were first married, I didn't like Jamie, but now I totally get her, totally love her, and I am completely attracted to her in every way and have the biggest sexual crush on her. She's my mom's partner, so hooking up seemed next to impossible. My mom's a flight attendant, and every other week she would be gone for three days on a flight to New Zealand. Jamie and I were having breakfast one morning while my mom was away, and I finally worked up the nerve to tell Jamie my feelings.

"Hey," I said to her. "I need to tell you something, but I need your word that no matter what, you will not tell mom." "Well kiddo," she replied, "I can only promise that if what you're about to tell me is not something that could put you in danger or whatever." "It's nothing like that," I told her nervously. "Then no matter what, I will not tell your mom," she promised. "Jamie," I said reaching across the table and taking her hand in mine, "for the last three years I've heard you making love to my mom, and,well, I kinda feel left out. I absolutely love and adore you, and I'm so attracted to you...sexually...." "Whoa," Jamie responded. "Now I understand why you've sworn me to secrecy. Confession: I've developed a bit of a crush on you Sammi." My heart lit up. "Well," she said. "Let's see how things go, and if it gets to the point where we feel it would be better to have this out in the open, then we'll discuss how to approach you mom. But for now, how 'bout we go somewhere special for the next couple days while your mom's gone to consummate our love." I smiled, blushed, and bit my lip and said, "I'd love that so much. You're the coolest." We packed some things, and hopped in Jamie's Porshe.