Sammy

Befriending Sammy
You will have to frequently visit the bathhouse and shower and talk to her more often until it trigger a scene with her to talk to you and give you the ability to use the VIP section and you would befriend her by then.

Wrestling match
After befriending her, she may be sparred with in the Gym. She's tough opponent (especially since no weapons are allowed), though she would hold back if the player is pregnant.

Defeating her through physical damage unlocks the Counterattack skill.

Attacks

 * Fuck her with your cock
 * Eat her out
 * Tease her feet