My mom is seen in the second picture behind the main singer. (2nd row, extreme right in a dark saree) and I may have been a little girl seated somewhere behind with the BV kids :).
Dad has shared about this incident in his book “Sai Prem”- My mom had been blessed with an opportunity to sing in the Divine presence but due to unmanageable crowd Swami had to leave early and my mom’s turn was just then. Though disappointed, she continued singing with full devotion. As soon as her bhajan was over, a spray of Vibhuti was seen on the harmonium indicating His omnipresence. Swami responds to the love and devotion of his devotees.