To be honest there is always a risk when lying that you will get found out so there isn't much you can do about that unless you come clean about the fact you want to stay at your 20 year old friends house. However I would like to say, try and see this from your mum's point of view, her 16 year old daughter wants to hang around with a 20 year old who for all she knows could influence you into sex, drinking and drugs. Yes 4 years might not seem like a lot in the future however now I think you need to see it how your mum does. She is probably just worried that your friend will get you hurt or into trouble because you are at different ages which means you are both able to handle different things.
I think your mum is just trying to protect you from some of the adult world which to be fair I know is frustrating however if something was to happen to you it would probably break her heart. There are ways to get past this and let her trust you and firstly it is by telling the truth about where you will be.
You need to communicate with your mother, and from there discuss with her what her main issues with your friend are and try and come to a compromise for when you hang out with her. The main thing is not to act like a child, so raising your voice is a no-no, walking off and just general teen behaviour when dealing with confrontation. Show that you are mature enough to talk about it rather than shout about it. This not only will gain you respect it might also mean your mum might give you some freedom to see this friend without the need to lie to her about when and where you are going.
I know it might seem like a scary thought to confront her however once you have you will feel better for it because you won't have lied to her and you will have acted responsible and talked calmly about what it is you do want. I mentioned a compromise, even is that is calling her at a certain time so she knows you are ok then work with her. You need to voice how you are feeling about this otherwise you won't get what you want.
Also be prepared for her to go mad, because you did lie to begin with however have an explanation ready. Say to her calmly can I explain before you carry on, and explain how you were worried that she would stop you going so you lied however now you have seen that it was wrong of you to lie and you want to come to a compromise about you going to stay at your friends.
I hope this has helped somewhat, and I know it is difficult when you want to do something and parents disagree however looking back, I wish I had been more honest with my mum about somethings that I've done.So just talk to her, and if you do it in the right way I am sure you will both come to some sort of agreement. Good Luck.
*Emma*
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