My brother was showering and I needed to urinate. As I waited I went down the stairs and tripped on my jubbah and realised the urine onto the carpet but it was not abundant, the carpet was more so damp. My mother stepped on it and said it wasnt wet and continued to walk everywhere else. My brother also went down the stairs with his bare feet. After cleaning the stairs, it had become wet. My mother did wudhu before so her feet are pure but my brother did not. (1)If he steps on to the wet carpet, will he make it impure again? (2)And when my mum stepped on the damp area, she said her feet were dry, does it mean her feet is pure?
With regards to the above case scenario, as you have washed the carpet, your brother stepping on it will not make it impure and your mother feet is pure as her feet was dry.
اذا وضع رجله علي أرض نجسة أو علي لبد نجس ان كانت الرجل رطبة والأرض أولبد يابسا وهولم يقف عليه بل مشي لاتتنجس رجله ولو كانت الرجل يابسة والأرض رطبة وظهرت الرطوبة في الرجل تتنجس رجله وفي بعض المواضع لايشترط ظهور الرطوبة في الرجل لأنه يظهر أثر الرطوبة في الرجل لامحالة