Getting massive anxiety from cousin's horrible situation

[Afakename]

I don't know who to talk to, my cousin would be the person I normally talk things like this through, but she really just needs my support.

This is an incredibly sensitive situation also. Last month my cousin had her whole world turned upside down as the police turned up and confiscated all internet abled devices as a while ago their IP was used to upload an indecent image of a child. She has children as well, so as well as her and her partner (completely denying everything) trying to cope, they have SS investigating (via video call, due to Corona restrictions) which is obviously really stressful. So far my nieces haven't been removed or been told that their dad can't see them or anything like that.

I am struggling with it also. I don't think my cousin is a pedo, but don't they say you can't tell, so I keep trying to think about whether the kids have ever been alone (moreso with her partner tbh) with them. There's been one occasion I can think of, but not more. We don't live very close so we tend to be all together at family events etc. I don't know what's going to happen long term. At the moment we can't visit because of Corona virus so that helps put off what I'm going to do about visits and holidays etc.

I'm also feeling really paranoid because I've sent her a photo of the kids playing with bath toys she's given as presents. Possibly one or two over the years of little toddlers running around bare bummed like they do? Rationally I know they take context into account but I keep catastrophising that means we're going to go through the same horrible things when they finish searching their devices and find that I've sent photos of day to day stuff. The really woolly definition of the lowest catagory of indecent images isn't helping given that a kid wearing a swimsuit can fall into that catagory given surrounding context and what if someone is being really zealous and doesn't take context into account?

I don't know what to do and I keep getting really upset which isn't helping anything.

The NSPCC website has lots of good resources surrounding this, including how to talk to children. If your children are old enough you can have the 'talks pants' conversation with them.
The fact that the children haven't been removed is a good sign regarding the seriousness of the matter.
And no, they won't suspect that the innocent pictures you sent were obscene or intended for any other purpose. The people investigating will be from a child protection team and will be specialists, they do these investigations every day and know what they're looking for.
You could call the NSPCC for further advice or the Lucy Faithfull (Stop it Now) Foundation.

The pants stuff is really good, I've used to it try and reinforce boundaries for my kids as they've been growing up. They've never given any hint of trouble and normally look at me like I'm an idiot for even saying it. I flip between nothings happened and then maybe something that would be inappropriate looking with hindsight happened (in which case I'm not sure if doing more than just reassuring them their bodies are their own and no one should be doing anything to make them uncomfortable or to do with their pants might make the impact worse?). I think I might actually melt down if I start seriously considering abuse against my kids.

I think that trying to cope with all the stress and uncertainty around Corona (I'm in a risk group for it) as used up ally normal anxiety resilience and now my mind is going haywire, latching on to different horrible scenarios and warping whatever's actually likely to happen into 'your children will be taken into care and you'll become homeless' I dunno why it's that and not prison - I think my brain thinks prison is better than homeless and the kids being made parentless the worse outcome for them?

I know I'm writing loads but it's all bouncing about in my head driving me mental.