You're right Katka, it's from a facebook site that hasn't been used for four years, set up to share stuff among the 11 members who are all part of the Siikanen family. Rebecka is a member.
And Ian, Glampop has them on her site as pics of Alex.
Here's a bit of evidence otherwise.
All of the pics came from that one site.
All of the people are named. (That's Jonathan Siikanen aiming the toy gun at Bex's bum.

)
Here are the relevant postings from Oct 20th 2007 concerning the pics.
Site description:- For all of us that knows who Mummi and Ukki are. And knows that Falköping is the kotätaste kommunen in Sweden...
Välkomna alla Mummi o Ukki fans.
Jess: "Tänkte att nu får vi ju kolla hur många som känner till oss...
Jag snodde idén från dig Rebecca...Sorry"
Bex: "Ha ha det är lugnt. Jag hittade några gamla bilder som låg och skräpade i datorn, håll till godo!"Translation....
Site description:- For all of us That knows WHO Mummy and Ukki are. And Knows That Falkirk is the kotätaste municipality in Sweden ...
Welcome all Mummy o Ukki fans.
Jess: "Thinking that now we have to check how many people know about us ...
I stole the idea from you Rebecca ... Sorry"
Bex: "Ha ha it's cool. I found some old photos lying around in your computer, help yourselves!"When I finish investigating all the leads from the site, and hopefully finding lots more good stuff, I'll let you know lots more about the Siikanen site/s.