With a sock.
Speaking of socks. Clothes does feel good to jack off with. Find a nice bra or pair of panties in your mother's dirty laundry but anything soft will do. Wrap it around your dick and use it as a cock sleeve. It might hurt but only if you're using something with rough texture.
I used to take care of my aunt's boss's dog when I was younger. She used to go out for vacations during the summer or someshit and left the house alone. She had a daughter that was smoking hot. Used to play with her and the sisters when I was a wee lad.
Anyway, she left all the bedrooms unlocked so I'd rummage through her daughter's panty drawer and use whatever I could find to jack off into.
It was pretty good.