At the beginning of Chapter 2, Catherine is getting ready to leave for Bath. The Morlands (Mr & Mrs, and Catherine's sister Sally/Sarah) continue to behave very sensibly, and just as I would expect an ordinary, normal, and caring family to act.
JA is clearly continuing the contrast between Catherine's family and the family of a "heroine," and it's quite funny. But more than a funny comparison, it's a realistic family.
"Everything indeed relative to this important journey was done, on the part of the Morlands, with a degree of moderation and composure, which seemed rather consistent with the common feelings of common life, than with the refined susceptibilities, the tender emotions which the first separation of a heroine from her family ought always to excite." The "common feelings of common life" strike just the right note for me, and I feel that I know many people just like the Morlands.