DISCLAIMER: I do not own any of the characters in the following story. They are from the movie Grown Ups/Grown Ups 2 and thus belong to the owners of the franchise.

This is a work of pure fiction and is centred around Greg and Keithie. It takes place in between the two movies, about a year before Grown Ups 2, when Keithie is twelve and Greg is sixteen. Keithie is beginning to go through puberty and seeks his brother out for help.

WARNING: This fanfiction will contain a level of smut between two family members. If this is not for you, don't continue to read. If it is, enjoy.

Greg's POV:

I sat down on the sofa after eating a nice dinner, and shouted goodbye to Mum and Dad as they walked out of the door with Becky, taking her on a weekend away. My dad popped his head back in the door and yelled "Take good care of your brother Greg, don't do anything that I wouldn't do", before slamming the door behind him. Yawning, I lounged further back on the sofa, bursting into laughter when I heard my mum shouting at my dad about how 'anything that he wouldn't do' ruled out basically nothing. Then, the engine started, and I heard them reverse out of the driveway and head off for the weekend. Finally, some peace and quiet.

'Greg', said Keithie, sitting down next to me on the sofa, 'Can we talk?'.

'Uh, fine' I replied, begrudgingly muting the TV and swivelling slightly to face him.

'I'm glad that we got this weekend together.', he said. 'It's been a long time since we had a while as just us two brothers in the house.'

'Great' I said, rolling my eyes, 'Can't we have quality time together whilst watching the telly though?'

'Maybe later', he replied. 'Right now, I need to ask you some questions about umm…'

'The sooner you spit it out, the sooner I can unmute the TV brother. You've got a minute to speak up or I go back to ignoring you.' I stated.

Keithie took a deep breath and then blurted out, 'Puberty'.

'What?', I asked, slightly taken aback.

'That's what I want to talk to you about.'

For the first time since he sat down, I completely ignored the TV and focused on him, swivelling around a little more. 'Well…', I prompted, 'To get answers you need to ask questions, although why you can't talk to Dad is a mystery to me.'

'I had the basic talk at school', he said, 'About body hair and sex and stuff, but I wanted to come to you about some more awkward things', he said, blushing.

'Ahh,' I said, 'I know what this is about, you're here because your dick keeps getting hard and you're too embarrassed to go to Dad about it, aren't you.'

'Yes and no. Yes, my penis keeps going weird, but I never even thought about Dad, I came to ask you because I thought you'd give me a straight answer.' He scooted closer to me, looked straight at me and said, 'Can you?'

Man, I thought, this is going to be awkward.

Sorry it's quite short, I just wanted to get the ball rolling. The next chapter is where the smut starts :)