V.S.
Hello EM. I don't really have any advice, per se, but I wanted to let you know that I thought you might be talking about my father, although I'm the only child of his with children, so I knew you weren't. My dad has been a pot smoker all of my life, and for some years before that. It's just a part of dad that we all accept. My dad does not get "high" so to speak, because he has been doing it for so long that his tolerance has declined, if not reached a plateau, but he will take a couple of "tokes" and mellow out. I'm not sure if this is what your father in law is doing or if he is absolutely smoking until he gets high (I know some might say high is high). I say trust your judgement (instincts), because if it makes you uncomfortable, then you will worry about your son the entire time he is gone, should you decide to let him go. I agree that I don't think he would be so callous as to do it in front of him, most are private about it, so that's probably not the issue, just his impaired senses, I'm guessing. I know a lot of moms will hate me for saying this, but my brothers and I turned out fine, my father never had any accidents or any other things going on, and we took many family trips together. Because of the fact that he is not YOUR father, this obviously is a hard call for you to make, because you have not been around him all of your life and may not have been in a situation where you can clock his motor skills nor reaction time. Like I said before, because of your qualms, I think it best not to let him at this time. Best of luck to you :)