You sound angry, frustrated, at the end of your rope. You also sound like you are blaming a
child for reacting to situations which probably feel beyond
his control to him... Think about it: he was 11 when you married his father, then reacted badly to the new household and got sent away from home for
4 years, banished to the grandparents home...
Then you move him back to your home and start parenting without addressing his issues, and I am quite certain he has them by how much he is acting out... Teenagers often act like bigger versions of toddlers. Their behavior is similar, they strike out, forget to use their words, have the worst case of "terrible twos" as the "terrible twelves." Then, worsen it by adding in blending 2 families... It's never pretty or tied up as easily as a Brady Bunch episode. It will probably be a constant struggle, unresolved until T is old enough to leave home and be out on his own. I understand your frustration, but I would like to ask you to step back and take a look at the world from your stepson's perspective for just a minute, please. As hard as it seems to you, it probably seems harder to him.
I've been a parent of a blended family and it
sucks. So bad that I wouldn't do it again without a family therapist on call, 24/7. The best bit of advice I can pass on from my last stint as mom of a blended family w/teenagers is to make each day a new opportunity to do well, to get along. Have rules in place, general or specific, but only the ones that make things work better for the whole household, like, "Do your homework, then these x chores, then your time is yours." Or, "Namecalling is not allowed, but debating your position articulately is." Those were 2 of ours... Then, you all have a clear idea of what is expected... Then, you need a system in place for handling infractions because teenagers will
test your rules... For us, we used a hierarchy of priveleges taken away for the rest of the day: no phone privelege, no leaving to go with friends, no tv, computer only if needed for homework, no stereo, go to your room after dinner, no dessert, only bread/rice for dinner, door removed if you lock yourself in and won't open it when asked... something like that: trying to tie them in to the infraction of the rules but also getting more extreme/confining. It can seem severe, but it's only for the one day (except in the case of the door: that would stay off indefinitely but would be returned to its hinges when the child behaves pleasantly consistantly.) I don't think my kids
ever went without dinner, but did miss dessert a few times... Then, when they wake up the next day, they have a chance to start anew. I would have done this w/your example of him pretending to be sick for 2 days and let him go scuba diving the 3rd day... You're the parent, so you
must parent or else, give up. Your situation makes it all harder~more convoluted since you did give up parenting for a 4 year stretch there... That makes this harder, means you need to give more to an already hurting boy, earn back his respect that I'm sure got damaged by the banishment to grandparents household...
Things
are different: the dynamics of a 15 year old with anger and abandonment issues are going to be different than those of an 11 year old who is adjusting to a new stepparent and household. I'm glad you won't make your dh choose because this'll all be passed in just 3 more years... Just think of it as 1,000 days of battles. Stick to rules that make sense, don't engage in histrionics, develop a stoic exterior, buy lots of Calgon or pamper yourself in some other manner in private and just don't let the boy know how frustrating you find his behavior... Protect your dd. Your friends will either understand and be forgiving or aren't much as friends go, but if things aren't contained by rules followed ardently, understand if they take a 1,000 day vacation from being your friends... Have you ever heard the question, "how do you peel jello from the wall?" The answer is, "Give it time," and that is also the answer to frustrating parenting dilemmas. Be logical, be fair, and give it all time...
Good luck! PP

(former stepmom to ds26, dd24, and biokids ds23, ds21, dd13, dd7, ds5)