After inner thigh Lipo surgery will pillows be needed to place between my legs?

You will be in a compression garment after liposuction, so the position that is most comfortable is what you should use to sleep. This may take some attempts to find the most comfortable position but you really don't need a pillow unless it is more comfortable.  

Dear ann doe,every plastic surgeon has his own postoperative protocol which he recommends to his patients. I would suggest you to discuss this with your plastic surgeon.Daniel Barrett, MD

Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

Ann I appreciate your concern, however most patients recover and sleep fairly comfortably after liposuction with normal prescribed pain medications. Most people describe the pain after liposuction as similar discomfort or soreness felt after a really hard gym workout. If pillows between the legs add comfort, by all means give it a try!  Be certain to consult with a board-certified plastic surgeon in your area to increase your chances for the best possible result. Good luck.