"When a teenage boys hormones kick in, he loses control of his cock.......it just stands to attention whenever it feels like it .....until now,playing rough and tumble with his young sister has been non sexual , but now just touching her tiny tits gives him a ridgid hard-on .......she plays with boys older than her brother, so she knows what he needs ......so she spreads her slender legs and guides his stiffy towards her smooth, tight slit.........and in no time at all her cunt has enveloped the full length of his raging prick and there is no chance that he can pull out before he spunks . His sister fucking loves it !"