Simply, it would be out of character. If you go after Reb, Ari (who wishes you'd go after herself) throws you out; OTOH, if you go after Ari, Reb (who wishes to go herself after Ari) feels "like a third leg" and leaves. The only result that gets the three of you together is you allowing Reb to go after Ari unhindered,[img]kator/smiley11.gif[/img] while having got Ari excited enough not to mind you staying.It's not just a matter of putting sex scenes everywhere, they also need to make sense. I guess the ArianneB comic says it best:
http://arianeb.com/comic7.htm
![special [img]kator/smiley103.gif[/img]](./images/smilies/smiley103.gif)

