Peter sighed as he finished tidying his desk and sat behind it. It had been a very long day. All he wanted was to go home to Olivia and Noah his family and be with them and also make love to Liv. It was only just after lunch, but as far as he was concerned it felt like it was the middle of the night. It probably didn't help that he and Olivia had been up until the early hours of the morning making love while also trying for another child together.

"Knock, knock."

It took a second for him to realize who the voice belonged to but when he did, he couldn't help the grin that spread across his face. He looked up and the grin grew when he saw Olivia closing and locking the door behind her.

"Liv, what can I do for you?" Peter asked with a smirk.

Olivia smiled as she walked to his desk and stood in front of him. "What, I can't just stop by for a chat?"

"You could have called if you wanted a chat, Benson."

"Benson?" Olivia raised an eyebrow and looked him in the eyes, it was then she noticed how tired he looked. "You okay?"

Peter watched as Olivia moved around his desk and leaned against the edge, her left thigh pressed against his right one. He looked up at her and placed a hand on her leg, giving it an affectionate squeeze.

"It's just been a long day." Peter sighed, massaging her thigh, his hand traveling higher.

Olivia raised her eyebrow again, her eyes drifting to where his hand was tracing circles barely a centimeter from her core. She bit her lip and looked back at him. "What can I do to make you feel better?"

Peter stood slowly and took Olivia by the hips, pushing her back so that she was sitting on his desk with her legs dangling off the side. He let his hands drift under her loose shirt and smiled when her breath hitched when she felt his hands on her skin.

"Kiss me." Peter muttered, his lips ghosting over hers, waiting for her to close the minuscule space between them.

Olivia sighed against Peter's lips as she did as he told her. She reached up and looped her arms around his neck, holding him close as his hands traveled higher towards her breasts.

"Feel better yet?" Olivia asked, pulling back just before Peter could deepen the kiss more.

"Not quite." Peter looked thoughtful and Olivia knew what he was going to say next. "You're wearing too many clothes, is there something we can do about that?"

Olivia said nothing but removed her blazer. She held eye contact with him as she slowly unbuttoned her blouse and allowed it to fall off of her shoulders and onto his desk behind her.

"Better?" Olivia asked as she removed Peter's tie.

"Getting there." Peter replied, unbuttoning the first few buttons of his shirt and then yanking it over his head, throwing it on the floor before he pulled Olivia in for another kiss.

Olivia moaned into the kiss when she felt Peter squeeze her breasts through her bra. She couldn't help but smile when he reached around her back and unclipped it with ease.

Without a word, Peter pulled away from Olivia and got to work on removing her belt and unfastening her pants. She smiled when Peter let his eyes roam over her torso though the noise in the building outside was a reminder that they didn't have long.

"We don't have much time." Olivia said as she hopped off the desk and quickly rid him of his belt, pulling down his pants and underwear.

"Turn around and lean on the desk." Peter muttered, kissing her neck as he pushed her pants and underwear down.

Olivia bit her lip and grinned at him as she did as she was told, turning her back on him and bracing herself on his desk. She looked over her shoulder and saw him moving closer.

"You're so wet." Peter murmured in her ear, causing her to moan as she felt his hand between her legs.

"I want you now." Olivia told him softly.

Olivia let out a soft gasp while Peter moaned as he entered her from behind, one hand wrapped around her waist and the other playing with her clit.

"You sure you can keep quiet?" Peter chuckled as he began to move, slowly to start, gradually increasing the pace as Olivia bit her lip to keep from crying out.

"I- oh god- Peter!" Olivia grunted quietly between his powerful thrusts. "I'm so close... Oh baby."

Perer felt himself nearing the edge at her words, but he was determined to let Olivia finish first.

"Come on, Liv, let go." Peter told her softly, rubbing her clit hard and fast while he continued to pump in and out of her.

Olivia's entire body was trembling and her nerves were on fire as she felt Peter's hand work impossibly faster, bringing her even closer to her climax.

"Peter... Oh fuck, yes!" Olivia moaned before she allowed her climax to wash over her.

Peter could only let out a low groan as he spilled into her.

They stayed still, Olivia resting her forearms on his desk, her head in her hands while Peter ran his hands up and down her bare back.

"Better?" Olivia chuckled, raising her head to look at him.

"Much." Peter laughed, finally moving away from her to allow her to stand.

Five minutes later, both were fully clothed once more an Olivia was putting the finishing touches back onto fixing her hair.

"Maybe you should come by for a chat more often." Peter joked as he walked Olivia to the door of his office.

"We'll see about that. The real reason I was here was to ask if you can pick Noah up from school today? We just caught a case I'm not sure I'll be able to get away on time tonight." Olivia sighed.

"Of course. I'll let you know when we get home."

"You're amazing. I love you." Olivia smiled, kissing Peter on the cheek as he opened the door for her.

"I know I love you too." Peter said smugly.

Olivia shook her head as she started for the exit.

"Liv." Peter called, causing a few heads to pop up in interest when Olivia stopped dead and turned back to face him. "I love you."

"I know I love you." Olivia shot back with a smirk before she turned and left the office, leaving Peter standing in the doorway to his office, shaking his head in amusement.

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