Telling Sam who he was was an option for a very brief, sporadic amount of time. Lucifer entertained and then dismissed the idea because Sam would grow up very confused and upset hearing all these things about his guardian - and Lucfier wanted to ensure Sam had a happy childhood. Unfortunately, between a distant, often drunk father and a very dead and absent mother, Lucifer had a challenge set before him. However, Dean proved he was very capable of garnering a smile from Sam, even if he did not understand his little brother, and for this Lucifer was grudgingly grateful. He did not like having to rely on the young hunter, but his physical control on the material plane was sinuous at best - as would have been any other spirit or ghost. It would prove frustrating in coming years, he was sure - and right.

Getting Sam to not reveal him was…interesting. It wasn't a difficult challenge, per se, but it required constant supervision.

Not that Lucifer was often distracted enough to tend to things other than Sam. Indeed, there was Sam, and then there was anything else, and more often than not, he focussed entirely on the previous and entirely disregarded the latter.

During Sam's very very early years, Lucifer would have to make sure that if Sam's eyes were on him, then he was standing next to or in front of someone else. Otherwise, Dean and his father might have grown worried about the baby that liked to stare at empty spaces and giggle at that instead of the people around him.

For a while, Lucifer was able to be lax about this however, as though John Winchester was a suspicious and sharp man, he was not often around to see such behavior, and Dean attributed it often to Sam being "such a weirdo" (and though Lucifer was not fond of the nickname, it was spoken with every ounce of affection that could be poured into a word, and it rarely failed to capture a smile on Sam's face, he allowed it). However, the moment Bobby Singer entered the Winchesters' lives, Sam found a more permanent and keen foster father. Which meant Lucifer could not let the baby stare at the walls for hours on end - although if Dean were present, it was hard for the baby to choose.

Indeed, he had a secret rivalry with Sam's older brother for attention. He was not proud to admit this, as not only was Dean unaware of it (and still managed to win far too often to not be a cheat), but he was also a small boy, whereas Lucifer was supposed to be able to boast an ageless wisdom and maturity. But Sam bred the worst of him, he soon found.

So, when they were housed at Bobby's (as they very often ended up being), Lucifer had to tone his more obvious presence down to accommodate for the uncle's watch. He could only ascribe joy to being the main focus of Sam's attention, and was of the general opinion that he was far too selfish to share. In fact, he was not loathe to admit that he thought too much of Sam's awareness was spent on others than himself. And it was true - he had spent millennia without any attention that he craved (demons being both unsavory and unwanted) - he could be possessive.

Later, once Sam started speaking, he would have a more difficult time. Thankfully, having no known name would benefit him here, as Sam had nothing else to call him besides "frien?".

It was entirely too endearing.

John went out hunting one day (as he spent most), having left the brothers behind in a motel. Dean was watching TV when Sam suddenly blinked out of his nap and cried out for Lucifer.

"Frien! Frien! Friiiiiiien!"

Dean was up already (and if Lucifer could begrudge the human boy anything, it was his devotion to Sam was impressive. It made him almost miserable, but he supposed he'd have to think of Michael every now and then) and trying to attend to a very distressed Sam.

Lucifer sighed - a little smug - and sat next to Sam, who finally began to calm, and watched as Dean finished soothing his brother. "Dee," Sam gurgled. Dean sighed but grinned, "You're ridiculous, Sammy, you know that?"

"Frien?" Sam asked hopefully, looking at Lucifer, who really did fight the smile.

Really he did. But Sam just reached out and, with another - more dramatic - sigh, he dropped his hand into Sam's outreaching ones for the inevitable finger-chewing that would ensue.

Dean snorted at the strange faces Sam made as he noshed on - to him - invisible fingers, and kissed his little brother on the forehead gently.

"Whatever, weirdo." He said affectionately, going back to his previous station - in front of the TV. Lucifer sighed again, though this time less theatrically, as it wasn't half as fun without an audience (even if Dean couldn't hear him), giving Sam a look.

"You know you're not supposed to do that." He chided the four-year old, who, for all of his age, seemed very capable of pouting at opportune moments for someone who couldn't understand a word he said.

But then again, he liked to talk to Sam a lot. Not because he was lonely.

He liked to think that Sam's soul was bright - and untarnished - enough that Sam could understand him when he spoke Enochian. And indeed, he much preferred it over the human garble, and it did quiet all those in the vicinity - regardless of whether they were aware of it or not - and charmed soft blessings into the air. Since the language was more of ancient sentiency than lingual ability, he liked to pretend Sam was keeping up with him.

Of course, the thought was dismissed when Sam squealed as he chewed enthusiastically on Lucifer's thumb.