Some of the more noteworthy highlights:

From the mouth of sshit15: You cleaned the bathroom? That is my job. You (as in me) dont have the right to do my job.
I put cereal bowl in the sink for him to wash and when dh reminds him to wash it sshit15 flat out says "I am not washing it, it is sm's job, it is not my job to clean up after her. She didn't rinse out her bowl, why should I have to wash it"..yep..took all I had to not crack said bowl over sshits 15yo frickn head. Had the blessed opportunity to remind him I don't have to feed him or give him a safe place to sleep so he better watch how he talks to me.
Sshit15 took 1 1/2 hours to wash one sink full of dishes. Severely challenged when it came time to dry the dishes. Had to ask how I expected him to dry the wet dishes...
Sshit15 splashed water on kitchen window. Proceeded to ask me how I wanted him to clean off the water? seriously - I cant make this shit up!
Sshit15 finally took a shower Sunday afternoon, put dirty clothes back on- he didn't see what was wrong with that fact even though dirty socks were Black on the bottoms. Told me it was none of my business how he dressed or if he did put dirty clothes back on - I finally had the opportunity to tell sshit15 to shut the fuck up and go do what was told of him.
Date night Saturday: went to subway to get all three boys dinner and sshit10 has a melt down because we got the "wrong" sandwich, he doesn't eat that kind of sandwich. Storms back into house, throws self onto couch, I get out of car and go face him and tell him to get up off of his ass and to get back out there as his dad was talking to him. Dh tries to talk to sshit10 who again decides to storm off. Sshit15 decides it is now time for him to start to parent so he body slams sshit10 into garage door and holds sshit10 by the head against the wall and holds the gate closed on him. Sshit10 punches sshit15 in the stomach. Yea! I really want to go out with dh now and leave my house in the care of these shits. Dh and I get all three boys together (meanwhile sshit10 who doesn't eat said type of sandwich has now devoured half of it). We tell all three boys to get along, reaffirm that sshit15 is Not the boss or in control of his bb and sb. Oh shit you should have seen this little child have a melt down. "what do you mean I am not in charge, I am the oldest, it is my job"- oh BS - dh and I told him straight up that he treats strangers on a play ground better than he treats his own bb. Dh and I have decided that we will get a nanny/babysitter from now own if we are to have a peaceful date night.
At lunch the next day we tell kids that we will start to get a babysitter when we go out for everyone's safety and to keep order in our house. Again-the tantrum that came from sshit15 was amazing.
Sshit15 has a compulsive need to constantly be touching/picking on his bb. Case in point is how they act in the back seat of the car. I was driving them home, and after the fifth time of looking in the rearview mirror and telling sshit15 to keep his hands to himself, to be quiet, enjoy the ride because he is distracting me while I drive (and as i have mentioned before to him, that when he leans over to pester his bb his fat head gets in my line of vision in the rearview mirror). I gave him plenty of warning..so the next time he reaches over and pokes and pinched his bb I jerked the steering wheel. LOL, even scared the shit out of my dh. Sshit15 goes white in the face. Dh tore him a new ass. My mission was accomplished. Cant wait til next weekend to see if he learned the lesson (im trying to have a little faith here)
Eeveryone was joking around making dry humor remarks about each other, I pip in and sshit15 says "shut up sm, no one asked you".
Dinner time: dh and I have commented on sshit15's horrible, vomit in my mouth inducing, eating habits at the table. He will take a whole slice of pork, use his fingers, fold it up, put it on his fork and stick the entire piece in his cavernous food hole. I had just finished showing sshit10 how to use knife and fork to cut a piece of meat when sshit15 did this to his piece of meat. Dh and both told him to put piece of meat back on the plate and cut it like a normal person would. Sshit15 gets offended because he doesn't care what other people think of him, he doesn't care what his manners are, he is going to be who he is and screw everyone. We brought to their attention the fact that we never go out to dinner with them all and how it is because of their table manners. That sshit15 may not care about what others think of him but that the way he presents himself is a direct reflection of how he is being parented. I flat out told him that from where I sit have to ask what the hell HAVE his parents taught him about table manners. Obviously Nothing. He only cares about what people "he cares for" thinks of him-basically telling me to my face and in front of dh (but I don't think he Really heard it) that I am not included in that group of "people he cares for". Thank God! Got that cleared up, BUT I do have basic standards in my house and if he doesn't want to live by them then he doesn't have to come back over.

The amazing, hopeful part of the whole weekend is on our way home from taking sshits back to bm's house, my dh was silent for a while then said "I don't think we can have him (sshit15) around any more. Did you hear the angels warming up their horns? Cause the day he says that sshit15 is not allowed to come over because of his attitude the full orchestra of angels will be heard by all! That gave me the chance to let it be known that under no terms will sshit be allowed to move into our house. Made it very clear that I am very open to sshit10 moving in with us though! There is still a glimmer of hope in him, especially if he can be separated from the horrible victim mentality of this bb15. The whole weekend seems to have my dh husband thinking. Lets see if he has the balls to act on what is brewing in his stomach.