I don't write smut so there will be no smut, just suggestion that it ends with the Deputy and some Seed siblings planning to have sex.
Reminder; you can decide if you both are lovers, just friends, enemies, whatever. Only thing that is suggested sometimes is that they do have a soft spot/feelings for the Deputy.
Joseph:
He wanted to glance but froze at what you whispered in his ear. He began mentally praying to God to let the Deputy stop and go do something more useful than try and indulge another person in your sin. When you snaked your arms around him and played with his belt buckle, asking if he doesn't wish to have some fun after years of not indulging in it, he put his hand over yours to stop you and told you that you shouldn't do this. When you frowned and said you were really hoping it would work, he gave you a frown before pulling your hands away from him and turned to hold your hands in his cupped hands, suggesting for you to attend the next church session. As you frowned and asked if he's basically saying you need God's help, he gave you a "I'm not even sure God can fix you" look before he assured you God will help you.
John:
He froze when suddenly arms slid around his waist and he heard you whisper something in his ear. His eyes shot to the peggies with guns, reaching for his pistol, but then he began focusing on what you were saying. When you finished, he chuckled and softly replied that your sin is not wrath but lust. When you slid your hand lower, asking if he won't indulge in the sin with you, he was trying to tell himself all kinds of things but then said fuck it and guided you to a private room. It's not as if it's everyday the Deputy comes to whisper something sexual in your ear and then allows you to have some "fun" with them, it's a rare opportunity that he won't let pass.
Jacob:
His hand was quick to swing back and snatch a hand full of your hair. It caused you to frown but you still went through with your plan to whisper some sexual stuff in his ear. It made him raise his eyebrow and unclench your hair slowly, interested to hear what thi sis about then he smirked and said you better stop before you make him do something you will regret. When you hummed and whispered you have a feeling you won't, he chuckled before spinning and throwing you over his shoulder before you could even react, saying let's continue this talk somewhere more private then.
Faith:
She let out a gasp as you suddenly appeared and whispered sexual stuff in her ear. She frowned, trying to ignore what you were saying and told you she will not take part in your sin of lust. When you rolled your eyes and said it's not sin but fun, she huffed and said you can call it what you want but she will not join you in these sinful activities. She normally tells the Father what you did or happened with you but this time she did not tell Joseph about what you did.

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Far Cry 5 Seed Family x Deputy! Reader Scenarios
FanfictionThe MC (you/your OC) is whatever age, gender, height, etc... you want them to be. The only thing I'm deciding is that you are the deputy. These are NOT necessarily lover scenarios, you can decide the status (enemies, friends, frenemies, etc...) betw...