One exercise that you should try is for the front thigh area, and it also strengthens the knee area. Sit in a kitchen type straight backed chair and straighten one leg. Do small lifts-20 to 30 reps. Repeat with the other leg.
For your inner and outer thighs, you can also do lying exercises to strengthen these areas like inner leg lifts and outer leg lifts. When these get easier for you, you can add ankle weights to add resistance, without putting direct stress on the knee like in squats and lunges.
Start weight after baby #3: 233.9
Current weight: 143
90 pounds lost!