You know, there should be a practical handbook available to parents of teenagers. Heck, there may be. What we really need is a support group! :)
Those years scare me. My daughter just turned 8 and I don't look forward to them at all. I can already tell they are going to be rough.

I just need one for teenagers fathers... I can handle my son;)
I hear what you are sayinf Now, I really really do.

I have a question. What would you do in this situation. My future brother-in-law is married with 3 kids, ages 19, 14, and 13. His wife allowed his 19 year old to drink and have his underage friends come over and drink but he put an end to it without her help and in returned she got mad.

Now the 13 year old girl recently was allowed to move into the basement. Here is where she smokes weed and cigaretees and drinks and does it with her friends. She even is allowed, by her mother, to have her boyfriend sleep over. The father has kicked the boy out and tried to have her moved back upstairs to be supervise but when he try he get curse out by the mother, daughter, and 19 year old son. It gets so bad to where he leaves and go to my fiancé house. Also, he tried to take the daughter cellphone away and she got mad and broke his car window. The mother got mad because he tried to take her phone away and threaten to call the cops but said nothing about the daughter breaking the window.

My question is if you knew about this matter would you call child protective services because I want to but am conflicted because some of my friends tell me not too. I just think it's bad that this 13 year old drinks, smoke, does drugs, etc and the mother is okay with it and it's wrong.

Oh wow! I don't know what I would do.
I can see how it would be darn near impossible to hold your ground with a child - when the other parent doesn't help.

You have to weigh your options. Analyze the impact. If you do nothing - what happens?
If you act - what happens? The 19 year old is considered an adult - so he wouldn't be taken away. The others however, probably would be sent to foster care (with an unfavorable home visit). Would that help the children?

And, I am sure that there are a lot of people who will know the answer to this - but would they or could they just remove the mom? She seems like the problem. But would children services do that?

The mom is the problem, she let the kids do what they want.

For example, I was at their house one time and the daughter call requesting the mom to pick her and her friend up, this was 10:30 at night. I went with the mom. After the daughter and friend get into the car the friend, who is also 13, light a cigaretee and mom does nor say nothing. I snatch it away from her and gave her a speech about smoking and made her give me the lighter and pack of cigaretees. Then instead of the mom bringing the daughter home she drops them both at a 17 year old guy house and thought it wa okay. I got out the car and had a talk with them, long story short they got back in the car and they drove back home. The daughter has been brought back home by the cops because she's roaming the streets 3am or later in the morning. The mother does nothing but takes her shopping later that day. I was so mad because what mother does that.