The parents have been able to maintain a healthy and active sex life, I'm open to the possibility that sometime in the early part of their marriage they might have occasionally included a lady friend of the wife for a threesome but certainly for the most part they have been relatively vanilla.
There has not been any incestuous activity in the family nor the desire to partake and it should be again noted that away from filming the relationships will remain platonic (except mother and father) , at least to begin with.
The parents brought their kids up with 'traditional family values mixed with a large dosh of reality something like this:
Don't have sex before marriage
Seriously, no sex before marriage
However if you must screw, make sure your in a healthy committed relationship before you do
If you can't wait that long , try to wait a month
If, you can't do that ,then never, ever, fuck on the first date
And always use a condom
Remember Daddy has a gun.
The reaction of the father and son when they see the porn.....the son will be hurt and angered by his mother and think his sisters are the sluts he has (rightly or wrongly) believed them to be and they are in deep shit for this one. ...the father will be seriously fucked off beyond reason , he'll ring his wife demanding answers and not want to listen to them, he'll be hurt he'll be outraged he'll be on his way to LA.
The reaction once the full story is revealed including the penalty for non payment of the debt...for the son I'll leave that open to the characters writer. For the father he'll try to reason , to stop the filming and find another way (if he sold everything he could cover the debt but not the lose of income), he'll forgive his wife and his darling daughters once he's calmed down ...he'll then demand the whole thing be done legally with proper contracts including a share of the profits (he accepts they have no choice at this point)
To start with the loan shark/criminal is not heavily involved in porn world , its more his newest venture and he needed some hot starlets, in the three years he's been using the mother and eldest daughter , along with the addition of the other two sisters he's grown in influence within the porn world and as such has been able to get better traffic to the various web sites he runs ....if anyone has recognised the women , no one has said anything until the son does.((happy for him to have been told about the site by a friend who's now telling everyone--again how they deal with that is part of the story...but its a bit late for the 'shame of it all' to matter, besides they have bigger issues like staying alive to deal with) However this ten picture deal is with a leading production and distribution company , we're talking dvd sales, promotional work , playboy channel , how they deal with global fame/infamy as the first family of incest porn is a part of the story