So I said I am not hundred percent satisfied with the first version of this prompt. So here is version two.

Owen was standing in the corner, semi hidden behind the flower arrangement. He waited for Amelia to come. When she showed up she was accompanied by her brother and sister in law. Knowing she will notice him and approach him alone he stayed standing there.

Amelia got up the stairs, few steps behind Derek and Meredith, she was picking the lower tip of her royal blue dress revealing golden high heels and her bare ankles.
When she got to the last stair she noticed him, smiling at him she excused herself, she watched Derek and Meredith disappearing behind the hall's door before she got closer to Owen.
"You clean up nicely Dr Hunt" Amelia moved her look all over Owen, from his black elegant shoes through his bowtie to his hair.
"I can say the same about you" Owen placed his hands around Amelia's waist "I thought it was impossible for you to look hotter then you look in scrubs but this dress…"
"You like it?" She asked "I was thinking about you when I bought it, I have a theory that it is easy to take off".
"Oh really? Owens hands moved to Amelia's lower back and then to her ass "I think we should confirm it, you know for science and giggles he pulled her closer so they were completely hidden from the eyes of anyone getting out of the front door, But they were visible from the side doors window, Derek standing next to it managed seeing them clearly.

"You know I think we should go away this weekend, take a nice hotel room, and be only us for the whole time" Owen stretched the word.

"I don't know I am very busy person" Amelia pretended considering it and then added seriously "how will we explain disappearing at the same time, cause I am pretty sure they already suspect after the third time you had a school reunion this year and I went to LA and came back with a cold and no tan at all".

Owen didn't have the chance to answer because more people came and it was time to get in.

Amelia and few other doctors had to give a speech tonight, Derek was one of them as well.

"So I will see you later?" Amelia asked not waiting for answer she turned around after releasing herself from Owen's arms, Owen looked at her and before she moved far slapped her ass getting a mischief smile from Amelia, she turned her face again to Owen sending him blowing a kiss before finally leaving. Derek watched it all from the window getting angrier and angrier, not sure if it's because they didn't tell him about their relationship or because how Owen, whom he considered a close friend treat his baby sister. He knew she had many meaningless relationships that were just about sex, he ignored them, but he wanted his sister being treated with respect even if she didn't care much about that.

Amelia sat down next to Meredith, Derek already returned to the table, he was sending mad glances, to Amelia and Owen who just came in the hall, sitting few tables to the right.

The evening began, first to give a speech was Catherin Avery as the representative of the Avery foundation. Then the first artistic part, and after the singer finished Amelia gave her speech, she was speaking behalf of all Heads of Departments in the hospital, she told few jokes and thanked all the donors.

Derek was speaking next, from behalf of the board. After few drinks and looking at Amelia looking at Owen way too much in her five minutes speech, Derek was mad and had a badly damaged judgment from alcohol.

"Good evening ladies and gentlemen, I am Dr Shepherd, yes the second for tonight" Derek said as the audience was whispering after he said his name "I want to thank you tonight like all those who were ahead of me" Derek saw the looks exchanged between Owen and Amelia, so he said angrily "I want to thank you for being loyal for our hospital and not betraying us, for not sticking a knife in our back, for respecting and…" he saw Amelia sneaking out, Owen following her a second later, Derek finished his speech fast "that's it thank you and keep… donating".

Derek exited the hall.

Owen went after Amelia, she leaded the way to the emergency staircase.

Amelia stopped walking when she heard the door slammed behind. She turned around to see Owen.

"I think my brother lost it" Amelia got closer to Owen.

"No offense, Amelia, but your brother is not really interesting right now" Owen got even closer, his hand found their way into his hair like always, messing it up completely.

"You are so right" Amelia kissed Owen so passionately they stumbled together not separating while doing that.

Derek lost Owen, by the time he got out of the hall, the trauma surgeon was already gone. Deciding that they can't be far he started looking for them. First in the men's room, then in the ladies' room, after looking almost everywhere he heard noises from the stairwell.

He opened the door and yelled "ahah" he saw Owen and Amelia. Amelia's dress' strap was off, Owen's hand was on her bare shoulder. Her hands were unbuckling Owen's belt.

When they heard Derek they both jumped, Owen in front of Amelia hiding her behind him.

"What the hell, Derek?" Amelia asked while fixing her dress and Owen closing his pants.

"I should be asking you that question" Derek waved his arms "You are doing… that behind me back".

"You want to watch next time?" Amelia asked furiously.

"Amelia" the two men shouted in horror.

"We are consent adult we can do 'that'" Amelia mocked Derek.

"Amelia you deserve respect, he can't treat you like that"

"Derek if you are trying to protect my innocence you are so late" Amelia made him blush.

"Derek we are having a serious relationship, we are thinking about the future and all" Owen's words calmed Derek.

"Ok then" he hugged Owen.

Amelia found the whole situation hilarious "the usual protocol is to offer at least few camels and an antelope if you are asking my hand from the tribal Chief" she rolled her eyes and left them alone turning off the light.

Owen never imagine when he entered this stairwell he will end up hugging Derek Shepherd in the dark.

Let me know what you think you opinion is important to me.