I was told off on here last week for insisting that even in a relationship breakdown, I still would not be trusting just anyone with my children. Trusting in a husband or ex fine, even then some may well be paedophiles. Many children are abused by their biological dad, let alone the massive amounts abused by stepdads.
I was making the point about not knowing the new partner, their family and friends. These people will be spending lots of time with your children, overnight and anytime really. If I don't know and trust them then they are not around my children.
An offender will offend in seconds and minutes when they spot an opportunity. They groom the people around them first, friends, parents etc before they groom the child. Usually very charming individuals, even the outwardly eccentric ones. But the vast majority are utterly friendly, nice people who hide an awful secret.
Yes sibling abuse is a thing and women do abuse but the vast majority more than 98% are men and the women who do so are usually victims themselves of these men, coerced or doing it to keep their man, (utterly repellent but still a man led behaviour. )
I don't care if people label me strange to be on guard and to safe guard my children, too many people are too relaxed. It's so prevalent, in too many societies and covid 19 lockdown has shown this. Femicide, rape and csa has peaked in so many countries. Greenland took steps as they already have a massive problem, new Zealand, South Africa, the UK, Mexico, Brazil, Argentina all large spikes on nos, to name just a few. Some countries literally have had 100s of more rapes and femicides.
We all need to be vigilant because yes op you are right, they are everywhere, doctors, politicians, social workers, teachers, delivery men, shop assistants, builders, family friends, cousins, brothers, uncles and fathers.
And never forget the lengths many go to to protect reputation and family, that's the role women play in this. Wives standing by their husbands and grandmothers/mothers closing ranks to protect sons, brothers and grandsons.