Okay, anyone who can find this fiction gets my eternal thanks and maybe a rainbow cupcake.
The story opens with Alex as an au pair to two twin geniuses, which is part of a mission from MI6. He is not allowed into certain parts of the house and to that he pays no mind. His employer is making moves and Alex does his best to get out.
However, he wakes up strapped down and his suspicions are confirmed. His employer is a mad man who wants to inject Alex with a serum to turn him into a child. He comments on what a lovely toy Alex would make. Alex is of course completely disturbed by the bloke's ravings.
And, Yassen is a BAMF. He breaks in, saving Alex, just because his ninja stalker tendencies are awesome that way. The employer ends up dead and the scientist is well… we will ignore what happened to him. His sons are totally okay with it and even thank Alex since their father was trying to lay hands on one of the twins.
And, the blip pops up. All the children were the house hold staff, de-aged into perfect, model-like children. And guess what? Yassen got shot full of the stuff too.
And, the feelings grow. Alex and Yassen have a heart to heart. The twins run diagnostics as Yassen de-ages and discover Yassen has de-aged to eighteen (still older than Alex). During that time, Alex finds himself playing house with the children and Yassen joins their little makeshift family. Slowly, but surely, they fall in love.
And, the break appears. Alex, not being able to escape, leaves to return to MI6.
And, the happy ending finally happens. Alex moves to California with the Pleasures, but he is to discover something strange. The Pleasures won't be living with him. Instead, Yassen will be his new housemate, complete with fake papers and name. His name was James Gregory or something like that.
And, MI6 has to interfere. Not really, Mrs. Jones, finally getting a chance to tell Alex exactly how she felt about exploiting him, bought the house and arranged for Alex's, and Yassen's, permanent residency there. Yep, she put both their names on the deed.
And, sexytimes ensue.
So find it for me? Or if you recognize it please message me. I loved it to bits, but was too busy to write it down. And the story starts next chapter.