She's not sure when it happened; the itch to see him, the craving that doesn't leave till she hears his voice but it annoys her. She's been alone for most of her life and she doesn't need anyone else in her life; doesn't want anyone else in her life. So it's annoying to her when her eyes flash to his form every few minutes, catching a glimpse of the strong shoulders and ginger hair. It's even worse for her when he looks up and catches her; he doesn't smirk or frown, he just looks at her and glances away. Sometimes she wishes she could punch him; maybe it'd be easier on her if his looks were a bit mangled but then that idea changes when he comes in one day with a swollen cheek and scratch under his left eye. A boxing match got a little rough he says and she finds herself torn between lust and concern; the concern bothers her.

She wants to defend him against Red's comments but she refrains and instead focuses on trying to make sense of the current case and she avoids Red's pointed gaze. It's only when Red corners her in the elevator of the post office that she feels the itch start once again.

"Do you like Agent Ressler?" He asks her point blank and she tries to school her face but he sees through it. "Ah so the ever cool Katherine Black has a secret! Don't worry darling; I won't tell."

"Lie." She states whilst huffing out a heavy sigh. His giddy laugh grates her nerves but she doesn't turn to him; she focuses on deep breathing.

"This is just excruciatingly beautiful; I thought he would fold first but you never cease to amaze me!" He laughs at her as he shakes his head. He doesn't notice when she whips around to face him but once she shoves him up against the wall of the elevator he does.

"I have allowed you to drag me all around this god forsaken planet because you saved my life once but you don't get to meddle with my life without my consent. You leave it alone." She quietly growls into his face; her hands clenching the lapels of his expensive wool jacket. He doesn't look surprised at her actions or her words but he looks disgruntled.

"Secrets don't do well in this life Katherine."

"Yeah you would know." She states as she turns to the opening doors of the elevator. Once she's free of the confines of the post office she's running towards her car in an attempt to free herself of the awkwardness.

She puts the tea kettle on later that night and is just about to settle into the bath when a knock on her door startles her. Quickly making her way to her door she unlocks it and cracks it open; she just about has a heart attack when it's him.

"Hey, sorry it's late. Can I come in?" He states quickly; she wonders if he's nervous. Nodding she opens the door and he steps in. She watches him look around her apartment; small and bare and she wonders what he's thinking. It's only when he turns to her and she sees that his eyes travel from her head to her toes that she suddenly remembers what she's wearing, which is practically nothing. She clears her throat when she notices him staring at her toes and he jerks his eyes back up to hers.

"So what's up? Everything okay; you need me to come in?" She asks as she tries to clear the tension.

"No everything's fine. Just wanted to check in; Reddington said you were upset." He says quickly as he shifts from one foot to another. She notices that he's not wearing his stuffy suit but instead a pair of blue jeans and a black t-shirt. She diverts her eyes from the way his jeans are hanging off his hips. The whistle of her tea kettle breaks her concentration.

"You want some tea, or a beer or something?" She asks as she pads her way to her kitchen. He watches how her hair swings behind her.

"No I'm good. I can take off if you were in the middle of something." He states as he follows her.

"I was going to take a bath to unwind but a cup of tea does the same thing so it's fine; you just got here." She tries to ignore ho her heart sped up at the thought of him leaving. He watches him shake his head and lean against the wall of her kitchen; she ignores the voice in her head that says she likes the picture.

"You okay?" He asks as he watches her bite her lip.

"Yeah I'm fine." She smiles brightly at him as she pours her tea. When she looks up from her steaming mug, she sees a look cross his face and it instantly worries her.

"Are you?" He looks up at her and she knows he's about to lie.

"Not really." He surprises her with the truth and it has her walking to him. He shakes his head and looks up at her and they both seem to realize how close they are to each other.

"What's wrong?" She asks quietly, her face worried.

He sees the concern written across her pretty features and he has to restrain himself from grabbing her to him. He instead focuses on her painted toes but that doesn't help; they're painted plum purple and they're delicate. He scans her again; trying to savor this, her. Her white t-shirt was big on her and fell of her shoulder; her pink shorts were tight against the flesh of her legs, her hair pulled up and her face free of makeup but he thought she was beautiful.

"Don; what's wrong?" Her soft voice breaks his thoughts and his eyes slam up to meet hers. In that second, he doesn't care what happens next but he wants to stay in the now with her.

She makes a small noise of surprise as his hands come up to wrap around her neck and he pushes his lips to meet hers. He swallows her surprise as he kisses her deeply; she feels the weight of it pushing against her and she likes it. Her hands rise up to his chest and she feels his heart beat speed up. His warm hands are wrapped around her face and she's flush with him; she standing on her tiptoes and her balance is off. She hears him groan against her and she smiles. Releasing her lips he looks down into her eyes.

"You said my name." He breathes out against her; his breath fans against her face. "Say it again."

"Don. Donald." She breathes out again and he's kissing her again but this time softer and sweeter. He walks her backwards and she feels the wall press into her back. He moves his lips to her cheek and down to her neck and she bites her lip. Her hands are pressing into his shoulders and she feels him lean in more; like a shield against her.

"Don; what's going on?" She asks trying to get the words out through the haze he brought her into. He looks up and he's breathing heavily; her fingers wrap around his ear in a caress and the worry is back on her face.

"I can't stop thinking about you." He states simply; like he was telling her about the latest case and she swallows hard at the conviction she hears in his words. "I used to hate you; you breezed into my life and sucked the air out of the room but somehow you integrated yourself into my life and I wasn't sure if I liked that."

"I know how you feel." She states as her fingertips caress his cheek and the bruise that marred it. She smiles softly at him and he smiles back before pressing his lips back to hers. She falls back into it; into him.