This doesn't seem normal to me.
First, why would they ask for a girl's pic first rather than showing guy's pic first, like it is always done. I don't think its right to show a girl's pic's to a guy's family and not showing their own son's pic.
This lady whoever she is, why is she sooooo much interested in getting the girl's sis married. Shouldn't her priority be her son right now. I think its okay to find the younger daughter some good match only after the older one is married by this lady. Doesn't make sense at all.