I forget what the exact prompt was for this, but it was inspired by a prompt over on LiveJournal. Edited by Blackwing (thanks again).
-------
Standing just outside the doorway to her father's bedroom, Alexis Castle gulped as she listened to her father's heavy breathing, the sound of skin on skin echoing, the hits increasing in volume.*
'Kate!' Rick gasped and grunted. The redhead knew that she'd just listened to her father masturbating, something she'd inadvertently done a number of times in the last few weeks. Since she'd chased the stewardess away, Alexis had known her father had been faced with nothing more than his hand to relieve the pent up frustrations she knew Kate Beckett built up in him.
'Shit,' Rick groaned, his footsteps heading into his bathroom.
Peering into the bedroom, Alexis caught sight of his bare ass before he vanished through the door. Seeing the towel on the floor, the newly 18 year old tip toed into the room and grabbed the cum stained fabric from the small bundle of towels on the laundry hamper before scurrying out the room and shutting herself away in her own room.*
Panting, Alexis dropped the towel on her bed and groaned, her dad's cum a contrast on the green towel. Wiping her finger through the cum, Alexis glanced at the door, her finger hovering near her mouth, her nose breathing in the smell of cum.
'Fuck it,' Alexis grunted, sucking on the cum-covered digit. Groaning hotly, she gulped down the small mouthful, her pussy heating up into her belly. Ripping her jeans open, Alexis plunged her fingers between her folds as she scooped up the rest of her dad's cum from the towel. The redhead had dropped to her quivering knees beside her bed, her fingers muffling the harsh groan as she fingered herself to a bones shaking orgasm.
*A few hours later*
Flopping onto the sofa, Alexis started demolishing the large sandwich she'd just made herself, her impromptu masturbation session leaving her worn out and sore in all the right places from pummeling herself with her toys.
'Pumpkin,' Rick appeared in the doorway to his bedroom, his wet hair flopping over his head. Alexis choked on the mouthful she'd just taken as she took in the damp spots on the worn T-shirt he wore, 'What have you been doing to get so ravenous?'
'Missed Lunch,' The redhead spoke around the food, her eyes turning to the TV on the wall, 'busy studying.'
'You should be more careful,' Rick stepped behind the couch and grabbed a corner, his hand twitching as his position gave him a view down Alexis' top at her creamy breasts, 'You should try and remember to eat.'
'Like you do?' Alexis gulped, Rick's hand on her shoulder spreading heat across her body.
'Touche,' Rick turned away and hoping he could walk away without his daughter seeing his erection in his sweatpants, 'Speaking of which, I should go and try to write some more.' Rick was relieved when Alexis smiled at him and turned to grab a magazine off the table. Taking his chance, he quickly made his way into his office, closing the door behind him and groaning softly.
His self imposed celibacy was sending him mad, his erection from his daughter tenting his sweatpants. Crossing the office, Rick slumped into his chair and pulled open his laptop, a sudden inspiration hitting him.
A few minutes later, Rick froze, his eyes shooting wide as he read what he'd just mindlessly written. His cock twitched as he read about Rook hooking up with a young woman, his description of her identical to Alexis. The father grunted as his eyes took in the words before him, the hot blowjob scene he'd written complete with Rook calling he woman 'Pumpkin'. Grunting, Rick slammed the laptop shut and jumped.
'Daddy,' Alexis stood in the doorway, her eyes locked on the open gap under Rick's desk, the older man suddenly registering that he had started slowly stroking himself as he'd read the scene.
'I'm sorry Pumpkin,' Rick winced, sliding his chair out of view.
'Was that Kate?' Alexis quietly spoke, Rick keeping his eyes on her face and not her nipples straining at her top, 'That caused that?'
'Alexis...' Rick grimaced when he watched her eyes widen, her red lips forming a perfect 'O'. Sliding his hand out his pants, Rick's face fell.
'You did,' Alexis gasped, 'I thought you could see down my top when you took my sandwich. I made you hard?'
'Pumpkin...' Rick stuttered. He froze when Alexis pushed off the doorframe and slowly padded across the room. Rick could only sit and watch his daughter round the desk, his body turning his chair towards her.
'Oh...' Alexis breathed, her piercing eyes dropping to the tent in Rick's pants, 'My boobs did that?'
Rick gulped, his hand reaching out to open the lid of his laptop. He let out a strangled choke when Alexis leaned over to read the words on the screen, not realize she was giving her father another look down her top. Rick's hand gripped the desk, Alexis' little gasps revving him up further as she read the scene he'd written.
Alexis could feel the tension rolling off her father, her eyes drinking in the scene he'd written. Finishing the scene, Alexis stepped back, her conflicted eyes locking on her fathers and seeing the same emotions flowing through them.*
'I'm sorry Alexis,' She could hear the tightness in her father's voice, 'I shouldn't have looked. It was wrong.'
'Daddy...' Alexis spoke quietly, her father starting to ramble.
'No sweetie,' Rick grimaced, 'I'm your father, I shouldn't be looking at you like that or imagining characters based on us doing things like that.'
'Dad,' Alexis spoke louder.
'Maybe I've got some sort of PTSD from her shooting,' Rick sighed, 'I should...'
'Daddy!' Alexis barked, 'Shut up!'
Rick's mouth snapped closed, his eyes jolting to his daughter's face.
Taking a deep breath, Alexis gripped the bottom of her top and whipped it off, Rick's shriek of her name when he realized she was braless.
'ALEXIS HARPER CASTLE!' Rick nigh on punched his face, his hands slapping over his eyes to avoid his daughter's sudden nudity, 'Put your clothes on now!'
'No dad,' Alexis peeled her shorts and panties down and kicking them off to stand naked before her father. She reached over and peeled his fingers from his face.
Rick instantly turned and faced the doorway, 'Please put your clothes on Alexis, this isn't right.'
'I have a better idea,' Rick jumped, his head snapping to Alexis in horror when he felt her fingers on the waistband of his sweatpants, 'Holy fuck!' Alexis breathed, her fingers pulling Rick's pants down, his cock springing free, 'Kate is a fucking idiot for not wanting this!'
'You need to stop now Alexis,' Rick pleaded weakly.
'You're too big for me to fuck Daddy,' Alexis rolled her eyes, letting out a breathy chuckled when she trailed her finger along the hard length, 'But you can't deny your self imposed ban on fucking isn't causing you no end of trouble?'