Having same issue with daughter. We're switching to 5 sets of 3 and micro loading.
Also, some advise you wont get on this board, because it doesn't fit well inside the SS brand: at your strength level, doing push ups is a wonderful strength building exercise. I would add some push ups to the end of bench days. These will build strength for likely a few months for you until you're benching well above 75% bodyweight for reps. Build yourself up to do sets of 5-8. You may have to start off on your knees, or doing half reps.