I know Generation Y overshares, but didn't JM call or text her mother that they went to the store to get feminine products? Must have mattered to HER. Documenting the visit was somehow important to her.
Only a few would consider that "documenting" the trip, IMO. To me, they had a conversation like they probably had often, and the trip to the store came up as a PART of that conversation. I can easily see two women laughing over the feminine products.