Patreon Pin Up 8/22/16 (Patreon)

Hey guys I'm posting early today because my computer is giving me trouble and I'm going to do my best to fix it this afternoon.  Here's hoping nothing explodes! ><

So a few months back, Trish started leaving home for an hour or two on Thursday nights after school, saying she needed to go for a drive and clear her head.  It wasn't long before Mary got suspicious.  What the hell did Trish need to clear her head from every week? It's not like either of them were real deep thinkers.  After a couple of weeks of this Mary's curiosity got the better of her, and one Thursday night she followed Trish to a motel in the next town over.  That's where she recognized Mr. Fontaine's car and Trish was busted.

 Mary could have a new boyfriend every day and Trish couldn't care less.  But when Trish so much as shows interest in a new guy,  Mary gets jealous.  She'll often interfere with the relationship or even sometimes try to steal the guy for herself. 

And so Trish found herself in the one place she hated being more than anywhere else on Earth: at the complete mercy of her sister.  If Mary told anyone about this affair it would be disastrous on every level.  So when Mary demanded to come along and join in the next week, there was little Trish could say or do to stop her.

Trish was still furious at the idea though.  Teaming up on a guy with your sister was just weird.  And it was just like perverted little Mary to want to try it.  Not only that, but she felt what she and Mr. Fontaine had together was special, the last thing she wanted to do was share that with Mary. 

But despite her bad attitude going in, Trish was surprised to find that Mary's inclusion ended up turning her on.  It was fun, the two of them putting on a show for Mr. Fontaine.  Trish enjoyed the look in his eyes when he watched her suck mouthful of cum out of his dick and then spit it into her sister's mouth.

Trish would never say it out loud, but now she's reached a point where sex in general just isn't as fun without Mary joining in.  She still enjoys some alone time with the man she loves, but the nights where Mary comes along are the ones she looks most forward to.