I've been lurking for a while but have a few things to add to the discussion.
I think the Natalie connection is too strong to be nothing so I've worked on the assumption that there is something relevant in that. I then discovered a post, now removed, on FB in which someone was claiming she had in fact been married to TJ at some stage. I have no idea if this was someone incorrectly understanding the Kim/DJ connection or in fact something of interest..... If this is in any way true, this makes TJ potentially Willam's GF.
If Natalie was indeed close to TJ then some kind of opportunistic revenge with a pedophilia element makes a lot of sense.
Also I think we've all worked on the assumption that the FGM randomly contacted Spedding to repair her machine. However, in smaller towns, many people are acquaintances. I personally don't live in a small place but have had the same whitegoods repairer in my home 4 times. Thus, I think Spedding was already known to her and therefore someone with whom she may make small talk and disclose William's impending arrival.
If Spedding/TJ and maybe Kim's partner have an association with Natalie and there is some bad blood there it might make sense that a snatch was planned. Kill two birds with one stone maybe?