I cant remember its name!!

I remember reading a story about two daughters being forced to fuck each other in front of their father while he was tied to a chair. this was all being done by a female dominatrix who had some vendetta against him and I think there was a male Dom too but I dont fully remember. the daughters were smacked by a wooden rod, the type used on calves and the back of your leg as a punishment, when they didnt do things to each other immediately. I dont remember much about how it goes near the end because I usually came around half way or less but one of the daughters got into it after a hit I remember that. or at least was less reluctant. please help me find that story again. I cant remember where I found it or who posted it but I would very thankful if someone could help me