Im looking for a one shot that i read a long while back. Its about a brother and sister and at the end the dad joins in too. It starts when the brother jumps on the sister while she's laying down on the couch and they go at it. Later it moves to the shower and thats when the dad comes home and joins in. At the end, the dad tells the daughter to wake up the brother in her own special way. its a long shot, but i hope someone knows which one it is.

i kind of like to read that doujin myself.
do you remember the artist name or anything similar to the name??