Roxanne, Talk to her about being a predator and she will offer with the right choices
Amy, once relationship is high enough and you escape the oral vore, she will offer.
Marlie, when you have high enough relationship, she will give you more options than just oral when looking for "extra" work.
Amanda, same as Marlie.
Soraya, get her relationship high enough and you will be offered when you go to the library Sunday morning.
Resi, meet her in her kitchen in the morning and you can sneak right in. Relationship has to be high enough.
There is also one for Wendy in newer versions that are not publicly released yet.