Hello Capri-Pink. To answer your question more specifically as opposed to the cooker cutter and e-book promotion you just got from Lynn....
Although it is hard to isolate out your inner thighs you can do exercises which involve concentration in that area. Two exercises you can do which activate that medial quad are....
an exercise called "wall sits", where you stand with your back against a wall with 45-90 degrees of knee flexion while squeezing an object such as a volleyball between the knees. The squeezing of the object between the knees is important since this recruits the groin muscles (adductors) and the medial quad. As a result, by recruiting the adductors, you are selectively strengthening the medial quad relative to the other quadriceps
ALSO there is the side-step-ups onto an aerobic step, bench. This is an excellent exercise to selectively recruit the VMO.
Remember that your inner thigh (adductors) work not only to "adduct" the leg but also flex the hip and extend the hip which means that in due time you will notice stronger/toner inner thighs from your squats, lunges, running etc....