What are the methods of purification from masturbation for someone who cannot perform ghusl for fear of exposure, and what is the ruling on his fasting after engaging in it?

Masturbation is forbidden by Islamic law and is among the steps of Satan. Committing it in Ramadan (definition) carries a greater sin. Whoever does it while fasting and ejaculates, his fast is invalidated, and he must repent, make up the fast, and perform ghusl (definition) (ritual bath). Shyness from family members is not an excuse to delay ghusl and miss prayers. One must stop this habit, offer sincere repentance, adhere to acts of obedience, seek righteous company, and ask for forgiveness.