Will the questioner be sinful if she allows her brother to take pictures of players from her device?

One must be cautious when using the internet to avoid falling into what Allah has forbidden, and to prevent others from misusing it through our devices. Watching football involves a waste of time and can be sinful, as players often wear short shorts that do not cover the 'awrah (private parts), which is impermissible to look at. It can also lead to discord, hatred, and injuries, and may cause one to miss prayers or delay them. It is not permissible to assist anyone in witnessing this evil, and one should advise a brother gently and kindly.