My sister pretends to sleep while she slipped the fingers

Knows what I do every evening, but do not like to admit it. I guess that don’t say anything to not accept our relationship of incest. For me there is no problem, I could easily accept that I would like to fuck my sister, but since she does nothing, I follow his game. Every night I go in his room without making any type of noise so that our parents are not there to hear. I lie next to her and began fondling her. I like to wake her while I touch her tits. Sits on the bed so that I can put my hand in her vagina. The masturbate for a bit until I feel her vagina completely wet. It is at that moment that I pierce. Try not to moan, but I know that she likes it. And finally, I go back to my room.