A hilarious stepdad left Twitter users in suspense — and laughter — as he live-tweeted his teenage stepson's attempt to sneak a girl out of their home.

The dad told his 43K Twitter followers that his 18-year-old stepson had a girl 'upstairs in his room.' He wondered how the stepson would 'smuggle her out" with the whole family awake.

His wife, however, had no clue their son had a female friend in his room.

So, she went into 'full Saturday house cleaning mode,' failing to notice the girl's 'cute white shoes' on the front door.

He then waited — along with thousands of Twitter users — to see how things would unfold and if his wife would find out.

He wrote on Saturday morning:

"I'm curious how he plans to smuggle her out now that the whole family is awake... and now we wait."

The tweet instantly garnered thousands of retweets and likes, and people were soon begging to know what happened next.

The dad tweeted 30 minutes later:

"She's still here, the wife has gone into full Saturday house cleaning mode. Still hasn't noticed the cute white shoes by the door. This could be his chance while she's distracted."

After sharing a snap of the white shoes by the door, the dad, from the US state of Michigan, then posted a photo showing his wife scrubbing the bathtub while listening to music.

He said of his stepson:

"Now's the chance.. will he see the opportunity??"

He then wondered if his stepson had a strategy, writing:

"I think they might be waiting it out. The wife usually lays down and reads after lunch, especially after cleaning her ass off all morning. Could he be waiting for that?? Can she hold her pee for another hour or so?? I have no idea what they are thinking up there."

Then, a short time later, he shared this bombshell update:

"OMG OMG OHHHH MY GAWDDDDDDD. SHE CAME DOWN TO USE THE BATHROOM!"

"IT'S ONE OF HIS CLOSEST FRIENDS! See... Mom might believe it's just a friendly sleepover; she was lucky enough to sleep through the f*** fest above our heads at 4 am."

His wife didn't seem to notice the girl. And there was another twist — the stepson finally emerged and grabbed the white shoes.

The stepdad wrote:

"Omg, this kid!! NONCHALANT AF, he casually strolls downstairs... AND grabbed those shoes and went back upstairs. Side eyeing me the whole way past. I shot him a little wink. They gonna hit that side door. bet."

As predicted, his wife then took her usual Saturday post-cleaning rest. Finally, the young lovers slipped out a side door.

Then he told his followers:

"Well, that's a wrap, folks! Mama just went to the bedroom to lay down and read for a bit. He's got a good 2-3 hour window... It looks like young love finds a way, for now!"

"And closure... Sure enough, hit the side door, and they went. I don't know about you but I need a drink after that suspense. Thanks for following along! That was amazing."