Long story....
I live with my parents with my two kids, my mum is clinically extremely vulnerable in covid terms, she is shielding again at the moment as shes been told to bu the government, eldest is at school and is currently on his third isolation from school where we have had to move to my exes again because of my mom. Hes offered us to stay with him until this calms down, basically as long as we need to instead of keep uprooting kids, we get along, but thats not the issue. Im unsure as i work part time and really rely on my tax credits. A friend if mine has said, you are not together its an arrangement because of the current situation, so you wouldn't get in trouble..... thoughts please?