Caught in My Secret Fantasy

My name is Alex, and I've been married to my wonderful wife Rachel for five years now. We live a happy life together, but there's this secret fantasy of mine that's been simmering underneath it all, my desire to be spanked by a dominant man. It started innocently enough with fantasies in the shower, but over time it grew into something more intense and real. I couldn't tell Rachel about it though; she's so sweet and nurturing, always making sure I'm happy and comfortable. How could I bring up such a taboo desire to her? So I kept it hidden, deep inside me. I've been seeing someone else, Jack, in secret for the past six months. It began as casual encounters, but lately we've moved into more intense territory. The last few times we met, he tied me down and spanked my ass until it was bright red and sore. He wore gloves to protect his hands, and I loved every rough moment of it, letting out moans and whimpers with each slap. I wanted to tell Rachel about this part of myself, but how could I? She's the only one who knows all my secrets; she’s trusted me completely. And yet here I am sneaking around behind her back, exploring desires that would terrify us if we brought them out into the open. The guilt eats at me, and the joy I feel with Jack is overshadowed by the pain of betraying Rachel. The other night, we had an especially intense session. He pulled off my panties and spanked me hard over my naked ass, making it raw and swollen, leaving bruises that would heal slowly. I cried out in pleasure each time he struck; it was like a release valve for all the frustration and want inside of me. We didn't stop until we were both panting and covered in sweat. Afterward, I felt such intense emotion, relief but also agony knowing how far from her I had strayed. I know what I'm doing is wrong on many levels. I have a loving partner who trusts me completely, yet here I am seeking out this darker side of myself with another man. My body craves it, but my heart hates itself for needing it. There's no easy way out of the situation I've put myself in, I've created a chasm between my public and private life that only seems to grow wider every day. Tonight, Rachel will come home from work feeling tired and wanting affection from me. She'll have no idea about the raw red marks on my ass or what they mean. For now, I’ll just hold her in our bed and pretend like everything is normal between us, pretend that she’s all I need.