Don’t feel too bad. My mum discovered my cousin was shitting himself regularly when he visted our home. I never noticed but my mum told my auntie “Your son is shitting himself every time he comes round. Sort it out”.
Cue a few days later his mum comes round midday when we’re gaming and takes him into the bathroom before bursting out and shouting - “BRING CARRIER BAGS AND A TOWEL!”