Two examples of Huck fibbing, fudging, or exaggerating the truth. Two examples of Huck obeying social conventions and authority.

Huck obeys the widows requirement that he wear his new clothing and eat dinner at the given time. Note, he does run away, but he is coerced back by Tom, who convinces him to stay by promising they start a band of robbers.

Fibbing:

Asking if he (Huck) could smoke, being told no, and sneaking a smoke later when everyone had gone to sleep.

I set down again, a-shaking all over, and got out my pipe for a smoke; for the house was all as still as death now, and so the widow wouldn't know.

Exaggeration:

There was a place on my ankle that got to itching, but I dasn't scratch it; and then my ear begun to itch; and next my back, right between my shoulders. Seemed like I'd die if I couldn't scratch.