how would you describe Aunt Polly's attitude towards Tom? Where can you find evidence for this?

Aunt Polly knows Tom is mischievious and expects it.... but she also has a huge soft spot for him.

“Hold on, now, what ‘er you belting me for?—Sid broke it!”

Aunt Polly paused, perplexed, and Tom looked for healing pity. But when she got her tongue again, she only said:

“Umf! Well, you didn’t get a lick amiss, I reckon. You been into some other audacious mischief when I wasn’t around, like enough.”