Looking for a classic porn from 80s, 90s, family themed

Hello,

I spent a lot of time looking for this movie, I've checked most of the classic family movies (Taboo... and so on) and I still haven't been able to find it. It is a "stanard" family sex movie.

Scenes that I remember:

1. Mom masturbates in kitchen, possibly with iron?
2. Daughter meditates in her room using some strange chant, something like "lem lem hayou lem lem yo", then starts to masturbate, later is joined by the mother. I think this might be the best scene to identify it as the chant is pretty unique
3. Sister has sex with the brother
4. Mother watches son in shower and has later sex with him

Please help, i want to relive my childhood!