"Seeing all this now I'm afraid of how someone will be able to see into my past. I have my share of not-so-great moments I sure wouldn't like you all to see -- but I guess I won't get a choice"

Because although Shelley is a good-natured and decently sweet person, she does have a notable capacity of being selfish in a way that causes significant trouble to other people. Not the greatest first impression she could make, those one would be.

"Remind me not to make you mad! I'm sure you can tell: I'm not good at fighting, flaw that goes awful with the stubborness I'm known for! If I get on your bad side that'll end with me nursing a bruise somewhere else in the rig"

Although she's keeping her tone cheerful it doesn't really take a genius to notice she's trying to lighten things up. As an apology, pretty much. Still...she does keep subtly glancing at the memory South.