My aunt just found out her son in law (her dd's husband) has been in prison recently due to looking at underage girls on the Internet. Her DD told her this, said he's sorry and will come back to live in family home soon (they have 2 dc aged 12 and 10 and the DH is staying with his mum). They live in the opposite end of UK so aunt who is elderly only sees them every few years, so didn't know about this. All is forgiven and her DD is telling her they want to forgive and forget.
I just googled his name and he came up in a number of newspapers, with his picture so it's definitely him. His offences are horrendous, he made and distributed photos of babies being abused and was linked (online) with known paedophiles. I felt obliged to tell aunt, she is obviously horrified and deeply worried about her DD and dgc. She hasn't told her DD she knows full extent, as she has her own mental health issues (bpd) and is worried about extra stress. She thinks maybe her DD doesn't know full extent, and is now thinking that newspaper articles have been photoshopped and it's all exaggerated 
My question is: would he be allowed to go back home to live with his dc with these charges? Can my aunt talk to anyone from social services etc to get confirmation about what he did? His family have completely minimised it and are sticking by him, so aunt thinks it must be a conspiracy or something. Is my cousin 'allowed' to stay in a relationship with him and keep the dc?