I noticed it within a few days after Partner went to France. I decided to wait and make sure it was no coincidence. It definetely is no coincidence. V had a few rocky days during and after K-camp but he is now recovered and quite enjoyable. Sure he still forgets everything and still struggles to express his thoughts clearly. But his attitude is so much better. He acknowledges his forgetfullness with humor and a smile. He even said he does not want to be "mean" anymore and get me crossed. I explained that he is NOT mean but he could indeed listen a bit better and just do what he is told without me having to say it 4 or 5 times. I would say the underlying issues are the same, just his mood is better. He does not argue as much and he plays quietly on his own. Sweet Pea is a bit of pain as any toddler but it does not seem to affect V too much. He gets annoyed ( I do too lol) and that's it. I even told husband that if V had been a single child, we would probably never suspected any real issues until elementary school. So what do I do with this piece of information? I know Partner is not the problem and I don't believe it has anything to do with sibling rivalery. V truely misses his brother, even cries a bit for him sometimes. I'm guessing life at home is just simpler without Partner around. V plays the way he wants and doesn't have to figure out what Partners does/wants/says etc. Sweet Pea is quite easy to understand: laughs when happy and cries when not happy. I really did not expect it. V and Partner are so close in age and had never been seperated. They love one another so much.