Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

A father's child, a mother's child, yet no one's son.

Who am I?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

I’m tall when I’m young, and I’m short when I’m old. What am I?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?

Take one out and scratch my head, I am now black but once was red. What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

What is full of holes but still holds water?