Need vent vent away.

So my mom a had asked my husband if he wanted a job. Now he doesn't need one because he has one but he wanted another 1. So everything went well until he had to do the drug test. Now he is a pot head. I had tried to have him quit but he won't changed. I could of left but it wasn't a issue for me. Now he used a herbal cleanse to cleanse him before the drug test. The lady from the drug place said he passed they couldn't find anything but it was diluted so he need to redo again so he went. Again his result was diluted so he told them he wasn't going to keep going since it's far and he didn't want to keep spending money on the drink. So he couldn't take the job. Now my mom is upset told the whole family he failed the test and he does drug. Now my family is talking bad and mind you they all smoke but they keep it quite that my parents doesn't know. Made it into a big issue when we wasn't around since they love to talk shit behind people's back. Now I told my husband well maybe if he would listen to me this would never had happened but he got mad and said well maybe if your family wasn't so much in people business this wouldn't be said about me. So I told him no matter what it's him who is at fault. I understand his point of you and yes I know they smoke because they all smoked with my husband. Like they all act like saints when they are not. When they got my 15 year son high I didn't make a big issue so I keep it to myself and son and husband. We sat down ans spoke about this. Instead of my mom speaking to us she had stated that all she was doing was helping us since we need more money and all. But yet that wasn't the case he just wanted a second so we won't be bored at home. Yes he helps with the kids and he is home all day due to the fact he works over night. And It's a full time job. It's so frustrating that this should be a big issue and for my family to talk about us behind our backs it's not cool. At least find out what happened. Only 1 person asked but that person is married in to the family. How dear they point fingers when they have their on skeleton. I'm hurt and mad. I want to bring this to my parents attention because this was not cool of my mom to involved people who shouldn't get involved with out personally life's.