How long have you been a step parent? It's it's been a long time and they're approaching teen years, then it may be due to that.
If that's not the case, they could possibly be getting negative comments about you from their mother. If the kids go back having so much fun then often the mom starts knocking it due to jealousy that they're having more fun with you than with her. Something has made them change and that could be it. As much as you want to go in your room, try not to because they will see that their behavior is "working". Don't tolerate what you aren't comfortable with in their behavior. But realize that they may be caught in the middle of something they don't want to be in. Try to see what's going on because you have years ahead of them in your life. If you've had a bad 3 months, you can choose to work to put an end to it or tolerate it for years ahead. I wish you the best!
at 11:04 AM on Apr. 7, 2011