Doubt About Legs Showing in Prayer

As-salaamu alaikum wa rahmatullahi wa barakatuh. If During zuhr and asr there is a lot of light coming from the windows . Even if one covers them with curtains , and stands , the shape of the legs can be seen . So the person used to turn on the lights , but even then when prostating , a shape of legs should be seen , so the person stopped using the lights , as her mother , ones closed them and scolded , as she thought it was carelessness , she didn't knew the reason ,and if told , she will take stress , thinking the person is going mad. So the person started praying in another room , but the same thing happened during prostration , but when during sajdah , the there is also hijab , if we remove the hijab and the piece of cloth that folds during sajdah , only then the person can see the shape of leg . The person also tried to see if the shape of legs could be seen , from behind where the light is coming during sajdah but couldn't see it . If that person covered the part where the light is coming from , but then during prayer someone takes it off , as they are not told the reason and if told the person thinks , she is gonna get scold . Should the prayer be repeated, when her mother is not there . But she is not certain that her prayer would end before her mother comes , as she takes a lot of time prayering , should she tell her mother to be in the room and rest while she oarys in another . What if that idea didn't came at that time .. What should this sister do ? Thank you .