A/N: Okay so I got a prompt, for a story I think but besides the point, when I asked for them in November and I somehow whipped this story up in my downtime. Which is all the time.

Prompt: "Jay has a PTSD episode and Will calls Erin to calm Jay and that same night Jay goes back home to him and Erin's apartment after realizing he can't fight his demons without her" Now, this is partially what you asked for, random guest, because I refuse to go anywhere near 4x17 fanfics but I made it so Will was still with him and he wasn't with Erin. Hope you can forgive me haha.

Also, I didn't mean for this to become smut but what are you gonna do lol

Enjoy! xoxo

Erin is jolted awake by her phone ringing. She whimpers and squeezes her eyes shut tighter, refusing to get up earlier than she has to. The ringing stops and she sighs, getting comfortable again. Then, the ringing starts again and she grunts.

She sits up forcefully and reaches for her phone, spotting the photo her and Jay took when they were together. Her heart swells and her eyes water as she sees the big smiles plastered on their faces, his face turned towards her and kissing her cheek. She gets caught up in the moment and almost misses the call again.

"Halstead, it is three in the morning you better—" She starts angrily but gets interrupted.

"Erin? It's Will, Jay's brother. We met today. I need your help." His voice is panicked.

Will? "Where's Jay? What's wrong?" Her voice becomes concerned in an instant.

"He's breathing really loud and grabbing his chest. He said to call you. I think he had a nightmare. Can you come? I don't know what to do," Will rambles quickly.

She jumps out of bed and puts the phone on her dresser and clicks speaker. She's putting a bra on as she speaks.

"Where is he? What's he doing?" If this is what she thinks it is, she needs him to follow her instructions.

"He's leaning against the wall, he's red, and he looks like he's choking," Will sounds petrified. She then remembers that he wasn't there for Jay when he came back from Afghanistan. This isn't a new occurrence for Jay. Even now with them being less frequent they definitely happened more often when he first got back. Her blood boils in anger at his actions, but it subsided because she didn't know him then. He's probably changed.

"Okay, uh, put him on the phone." This has happened once before. Jay had a nightmare about Afghanistan and called her, short of breath. She didn't know what to do then either, but this time's different. She's out her door and sprinting to her car as she hears shuffling.

"He's on," Will replies before she hears Jay's labored breathing. Or whatever he's doing. That doesn't sound like breathing. It sounds like he's trying to breathe with a bullet in his lung.

"Jay, I need you to sit down and relax. You are having a panic attack. You can control this. Take deep, complete breaths. Remember how we did last time? I'm on my way." She heard him let out a sob and her heart breaks at the sound.

"I need you," she can hear the struggle it takes to say the words in his voice.

"I'm coming, I know."

Erin gets to his apartment in five minutes with assistance from the lights and sirens hooked up on the car.

"Will, open the door." She sprints into the building as fast as she can, needing to get to her partner. She hangs up the call after that. She takes the stairs to get there faster, passing Will and running into the open door of his apartment, to his bedroom to find his shirtless body on the bed with his head in his hands, elbows on his knees. His breathing somewhat slower and more controlled since she first got the call.

She closes the door behind her and rushes toward him. Her hands close over his wrists, pulling his hands away from his face and replacing them with hers. She strokes his wet cheeks with her thumbs.

"Hey, your fear is making your heart pound harder, but your heart is fine. Deep breaths." He listens to her words, slowly but surely trying to slow his breathing. His arms snake around her waist and he brings his forehead to her chest, the height difference unfamiliar to them. She rests one hand on the back of his head, and the other on his damp neck.

A few minutes later, his breathing has finally slowed to a normal speed, the only side effect left is his quiet crying.

He lifts his head off of her chest, "Will you stay with me?" His voice was so unfamiliar, his throat hoarse from the sharp breaths and crying.

"I'll always be here, Jay. I meant what I said today, I still care about you," she assures him.

He reaches for the hem of her shirt and slowly lifts it up halfway, pressing his lips against her belly. His hands slide up her back and stop at the clasp of her bra.

She feels him unclasp it, "Jay," she stops him.

"You don't sleep with a bra on," he tells her, and she understands what he's doing. He's making sure she's comfortable. Her heart swells for the umpteenth time tonight at the thought of him remembering her sleepwear preferences. She finishes the removal of her undergarment and drops it on the floor.

She toes her shoes off and climbs into his bed with him, letting him rest his head on her chest again, his body covering the better part of hers. Her hand slips into his hair again, massaging his scalp with her fingernails. Just the way he likes it.

"I had a nightmare." She nods her head but then remembers he can't see her.

"I know." She leans down to press a kiss against his hair, silently letting him know again how much she cares.

"It was about you." Her hand stops in his hair. He had a nightmare, she thinks, about me? The revelation feels like a punch to the gut. She stays silent but continues the movement of her hand. She's not going to question it if he doesn't want to elaborate, though her eyes start to water.

"You were kidnapped," he pauses, swallows, "and murdered. I was the one who found your body, bruised and bloodied. It felt so real when I woke up. The dream ended with me going to sleep, so when I woke up I thought it really happened." Her tears fall then, and she holds him against her tighter.

His head rises against her, "I love you." She sucks in a breath.

"I was thinking about how quickly it could all end. I would never forgive myself if something happened to you, either of us, before you got the chance to know." Her hand cups his cheek as he talks, the tears flowing out of her eyes coming faster. He leans in to press his lips to hers for a short moment, just enjoying the closeness and his love radiating around them. He pulls away and presses their foreheads together.

"I love you too. I don't want to cool off anymore," she whispers against his mouth. He moans at her confession and slams his lips against hers, getting on his knees and cupping her head. He's straddling her small body and wiping the tears from her face. His hands move from her head to her neck, then travel down her abdomen to the hem of her t-shirt.

"Arms," he mumbles against her. She complies with his request, or demand, and raises her arms above her head for him. He slowly brings the shirt over her head, his eyes widening as he remembers she has no bra on. He slides his body down slightly and pecks her lips once more, and then moves his face to her neck. He sucks on the spot behind her ear and she moans lightly.

His lips trail to her collarbone and then dip to suck on her left nipple. Her hands fly to his face and she moans as his tongue circles the wet nub. His left hand reaches up to cover her mouth, remembering they weren't alone in the apartment. He releases her with a pop and turns to the other one, giving it the same attention.

His free hand trails down her torso to her leggings and slips underneath them. He whimpers when he finds she has no underwear on, immediately coming into contact with her wet center. His fingers find her opening, circling it a few times, before pushing in as far as he can go.

He muffles her scream of pleasure with his hand still against her mouth, her teeth closing on his middle finger. He winces but keeps his hand in place, pumping his fingers in and out of her until she was shaking. He pulls them out right before she reached her climax, removing his hand from over her mouth and moving down to rip her leggings off. He discards the boxers he intended to sleep in and moves back up her body. His mouth closes over hers in an overwhelming kiss, copious amounts of love and acceptance pouring into it.

"I love you so much," he repeats and slowly eases into her.

She moans louder and he kisses her again, attempting to muffle it. He pulls out and pushes in again, slower than they've ever gone. This isn't sex. Not what they normally do. This is what making love feels like. Erin's overwhelmed with pleasure and affection as he presses his lips against hers again, just to be closer to her. If that's even possible.

The slow pace is starting to grow on her, not wanting this to end. This feeling. But the need to climax got the best of her. She brings her hand to his shoulders, lightly squeezing. He understands what her actions mean and he speeds up the pace.

He rests his forehead against hers as he pushes into her faster, deeper, no longer caring about how loud she is because she deserves to be as loud as she wants.

He feels her walls closing in around him, and she can feel the tingling sensation she gets, the one only he gives her, when she's about to come. He speeds up even more if that's even possible, and her legs stiffen beneath him.

"I'm gonna come," she whispers to him, knowing he loves it when she voices it.

Her walls contract around him so hard he whimpers, a feeling this tight unfamiliar to his dick.

The scream she lets out triggers his release and he climaxes in her tiny cavern. He continues to pump in and out of her until she stops shaking, only pulling out when she does.

She curls against his body as their breathing calms down for an entirely different reason than it would have been not thirty minutes ago.

They drift off into a dreamless slumber and she's grateful that they don't have work tomorrow. They can sleep in as late as they want.
LINE BREAK RIGHT HERE GIRL
"Have fun last night?" The first thing Jay hears when he exits his bedroom sans Erin in the morning is his little brother's annoying voice and the morning news in the background.

"We did, actually," Jay replies with a smirk as he walks to the fridge for a water.

"Sounded like it. Rehydrating?" Jay laughs at his brother with a nod as he gulps the water down, placing it on the counter when he's done.

Erin then emerges from the bedroom wearing Jay's t-shirt and her leggings, sans bra.

She starts walking over to Jay in the kitchen when Will opens his mouth, "Hey, morning! What horror movie did you guys watch last night?" Erin blushes at his smart-ass comment regarding her screams.

"What silent movie did you watch last night?" She smirks as his smile drops and he goes back to watching the TV. Jay laughs at her reply and wraps his arms around her waist when she reaches him. He turns them so she's between the counter and him.

"Good morning, beautiful," he leans in to pepper light kisses over her face as she reaches for the water he just put down. She smiles at the sensation his soft lips create. "How did you sleep?"

She takes a long drink. "Well, I had a dream that the man that I love told me he loves me," she gasps dramatically and he smiles widely at her, "Oh! Wait, that actually happened. How did you sleep?" Her voice gets quieter at the end, making sure Will doesn't hear.

"Better after you came," he whispers and leans in to peck her lips.

She smiles against him. She loves this man with all her heart. She wouldn't have thought last night that less than twelve hours later she'd have confessed her true feelings and made love for the first time. And everything happened with Jay. She knew being together wasn't going to be easy but she didn't care. She'd stick around for every panic attack and every nightmare if it meant being loved by him.

Being loved.

It seemed surreal to her until this moment.

Everything's changed.