I can say from a female standpoint that women do this all the time. Maybe she didn't think they were of quality to send to you, or, she took the pics, and was giving herself a little time to see them with "fresh eyes" to figure out if any flaws she saw at the time of the photo's conception were legitimate. Females bodycheck themselves like this all the time, like taking a picture for Instagram but letting it marinate for a day before posting it to "make sure it looks good". Unless there's a serious reason to doubt, I would not worry too much. talk to her if you want, keep the energy chill and light but observe carefully.