What if Jay had shown up instead of Justin?

The minute she set down her car keys, the doorbell rang. A smile graced her lips as she walked over to answer it; she already knew who it was. And she was maybe a little happy that he had come back even though she had made it quite clear they couldn't get involved. Their jobs would both be on the line the minute Voight found out. It would only be a matter of seconds; he was already aware of Jay's affection for her. What he didn't realize was that Erin, too, felt an instant connection, one she couldn't quite pinpoint. There was something about Jay that was different from all the other men she knew. He was gentle and understanding. Whenever they talked, he always held a sparkle in his eye. She knew she could trust him with anything. Erin guarded her heart and built up walls, but for the right person, she was willing to let them see her for who she really was. She had let Jay in on her past-he was beginning to see the Erin Lindsay she didn't want anyone else to see. He saw the real her. All the others in the Intelligence Unit saw the Erin Lindsay that she had molded and created; the Erin Lindsay she had made up. She had no regrets telling Jay the things she did earlier that night; she trusted him with her past. There was a connection they shared that told Erin he was someone she could trust. And that was such a damn good feeling. When she was around Jay, she felt special and appreciated. She felt as though Jay would protect her under any circumstance. She could see herself being with him one day. And he knew that. Readying herself and checking her make up in the mirror, she quickly opened the door. The minute she saw him standing there, suit and all, her smile grew.

"Hey," she whispered, her voice being the only other sound around them. Their eyes met, and Jay, without saying a word, opened the door wider and stepped inside her cozy apartment. He was used to its layout; this wasn't his first time visiting her. He inched closer and closer to Erin until her back was against the wall; her breath shortened and he could feel the electricity between the two of them. Their bodies were mere inches apart and his forehead was almost touching hers. Every few seconds, he'd glance at her lips…Erin took notice almost immediately. She rested her hands along his chest, playing with his suit. His eyes shined in the dim light.

"Stop giving me that look," she murmured, looking him right in the eyes.

"What look?" he asked innocently, a smirk spreading across his lips. He moved his hand to her cheek, tracing gently along her cheekbone, as he leaned in closer. He could feel her body tense, and then loosen, as his touch met her smooth skin.

"The one that makes me want to kiss you."

"Then kiss me," he teased. Erin felt the butterflies in her stomach begin to flutter faster. She also noticed Jay leaning in even closer than before. Two more inches, and his lips would be on hers.

"Halstead, you know we can't do this." Her voice was quieter, barely audible.

"True, but you also can't tell me you don't feel something…right here, right now," he replied, the sound of his voice matching hers.

"What if I don't?"

She knew damn well Jay knew she was bluffing. Quite frankly, she didn't know why she wasn't giving in to her feelings. Maybe it was the thought of losing Voight? Losing her job over the stupid, yet amazing, feelings she had for her partner? Whatever it was, Erin knew she couldn't hold back much longer.

"Prove it," Jay challenged.

Without further hesitation, Erin gently pushed herself off the wall to meet Jay's lips with her own. Their bodies moved closer until no space was between them. Jay's hands found their way down to her waist as she deepened the kiss, laughing softly.

"This shouldn't feel so right, but it does."

Jay chuckled and took in a breath.

"Oh, definitely."