What the hell did that lecherous daughter slip into her father's tea, some kind of stimulant? She deliberately wanted him to get a hard-on, and she walked around the house in her panties! And where could the man go when his head had already caught the target. No dick could resist that temptation.
Brother does not have to get bored in the family circle: while he puts his little sister on his dick, while the second one, the evening will pass imperceptibly. A threesome is much better than television and is healthier!