It is true what they say, "you need a thousand lies to cover up one lie" and sometimes it really is not worth it. In certain situations, telling a small white lie doesn't seem like a big deal but in the long run, it brings nothing but hurt.
Why tell anyone “I will be there in five minutes†when in actuality you will take an hour? Have some pity on the other person’s phone bill and tell them you will be late so that they don’t have to keep calling you up after every five minutes.
Especially if it has gotten someone else into trouble. The right thing is to own up to your mistake and not let anyone else suffer.