I took part in cheating in order to help my twin brother and myself.
Did your brother ask you to cheat?
Yes I did. I am always there for my brother.
I can understand your family bonds, but is wrong to cheat, regardless of situation. If you get caught you would face dire consequences, so you should always be honest and play fair.
Fair is a overrated concept.
Well, just because he is your brother does not mean that you have to do wrong to help him. There are moral ways you could help him as well, without taking advantage of others.