We were returning home after my step-daughter had taken me out for my birthday. My wife had died seven years ago, and I had raised Kate, the child from her first marriage, with our own daughter, Rebecca. Rebecca was staying with a friend who had moved away from the area for a week, so Kate had offered to take me to a restaurant for my birthday. She'd put a lot of effort in too. We'd been to the finest restaurant in town, and she was wearing her best slinky low-cut black dress, which clung to her generous curves. She'd had her long, blond hair done especially, and she looked fantastic. I must admit, I'd enjoyed all the jealous looks from the other men in the restaurant, who clearly assumed that she was my young girlfriend. She had seemed to enjoy it too.

We sat up and talked for a while, about her future, where she would go to college, what she wanted to do for a career. Now Kate was growing up, it was fantastic to have someone to talk to. After a while, she got up.
"Well, I guess it's time for me to turn in." she yawned.
"Yeah, me too. Thank you for a wonderful evening". I stood up, and gave Kate a hug.
"I had a great time too, Dad." she purred, and gave me a peck on the cheek. I turned my face toward her, and then she kissed me on the mouth, and our lips held together for a couple of seconds. Then, she pulled her head back a couple of inches and looked me in the eye. Then she kissed me again, and her mouth opened a fraction. Her tongue slipped in to my mouth. Without thinking, I reciprocated, and we kissed passionately for a few seconds.
"Goodnight then.", she said, and headed up to her room.

Laying awake that night, I didn't know what to think. I could hardly believe it had happened. I felt as if I had betrayed my dead wife's memory. But the thought of Kate's breasts rising and falling against my chest, her tongue eagerly exploring my mouth and my hands on her young flesh: but most of all, the look she gave me beforehand. Devilish yet innocent, her eyes sparkled and controlled me.

Over the next couple of days, Kate acted as if nothing had happened. I couldn't believe she was so nonplussed by the whole thing, while I wanted to laugh and cry, every second of the day. The only change in her that was she became fond of strutting around the house in short skirts and cleavage-hugging tops. Sometimes, I allowed my gaze to rest on her a little too long, and, when she noticed, she would smile, or wink, and then carry on with what she was doing.

Then, after getting home from work, I found her on the sofa. She was wearing a short plaid skirt, and a tight black top. She clearly had no bra on, and her nipples were pressing against the fabric. I sat down next to her.
"I want to talk to you about the other night", Kate said, fixing me with those blue eyes.
"I'm... I'm sorry", I murmured.
"You've got nothing to be sorry for. I just don't want you to feel uncomfortable around me, Dad. I love talking to you, and being with you. I don't want to lose that."
"Of course not, baby. You can always talk to me." I shifted nervously on the couch.
"Good. I kissed you because I wanted to. If you don't want me to do it again, I won't."
I paused for a second.
"I just feel like I'm betraying your mother."
"How could you be betraying her,"Kate spoke softly,"You've looked after her daughter, when you had no responsibility to. My real father didn't want to know. My mother would be proud of you."
"She wouldn't be proud of us right now." I interjected.
"Well... no. But we're both adults, and we can make our own decisions. Dad, I think you're sexy; and I think that you feel the same way about me. Living here in this village, sometimes... sometimes I just need to feel a man next to me, and I want it to be you."
"What are you suggesting?" I enquired nervously.
"Well, I'm not suggesting we should be girlfriend/boyfriend, I know that wouldn't work. I'm just suggesting that when I need a kiss and a cuddle, that you should be there for that."
I sat in stunned silence. We stared at each other for what seemed like a long time.
"Do you want to kiss me now?", Kate asked.
"Yes." I resigned myself, I was powerless to resist her.
Our lips touched and I lost myself in her. We kissed for hours, first tenderly, then more passionately. She lay down on the sofa, and I lay down beside her. My hands caressed her midriff, until she took my left hand and guided it to her breast. I gently squeezed and caressed it, and toyed with her erect nipple as we continued to kiss. Her breath was quickening, and she moved her left leg around my torso, so I was lying between her young, firm legs. Her skirt had ridden up, and my trousered cock was pressing against her silky white panties.

She guided my hand under her top, and I felt her smooth, soft skin, and held her naked breast in my hand as her chest rose and fell. Then, she got up, readjusted her clothing, and looked at me, helpless, on the couch.
"Thank you, Dad", she whispered, as she, once again, left me to consider what had happened.