Here is the full list of all 45 Sisterly Lust achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
You've become a father, a lot...
You married all the girls.
There's nothing better than a girl's smile, though maybe...
Dwayne got his just reward.
Bella has become a special friend...
Agreed to pay Bella in installments.
Nia, Rachel and a couch at night-time.
Dealt with Hazel yourself.
You broke up with someone close to you.
The cake might be a lie, but not the pie.
Rebeca created a very special sculpture.
Susan discovered you with Rachel in the woods.
Liza has become a woman.
Experienced a special moment with Susan.
Rachel and Bella agreed to share.
Met with Valentina Glorious after the concert.
Susan has discovered your Discreet identity.
A fun-filled sleepover at Ana's.
You and Bella have grown very close...
Seduced the reverend's wife.
Fallen in love with Iris
Encountered Ana and Alina in the library.
Fallen in love with Susan.
Agreed to share Ana with James.
Rachel lost something.
Had a good time when out and about.
Let James deal with Hazel.
Met Adriana for the first time.
Fallen in love with Bella.
Fallen in love with Rachel.
Fallen in love with Liza.
Beware of whom you give a hug.
Riley and you have had a good time in a shop.
Saw the first flashback scene.
You stood up for Rachel against Mrs. Steel.
Spending a penny is just so much fun.
Punched Brody in the face.
Watched the entire video of Brody and his 'friend'.
Fallen in love with Riley.
You've perused some of Susan's bedtime reading.
You haven't romanced anyone, except Rachel, Bella, Liza and Susan.
Only had affairs with all the older women.
Never had a relationship with anyone.
Appreciated the womanly form multiple times.
But it most certainly made your day.