Ultherapy. 1st treatment worked but I need a second one. Should I do it before or after liposculpture?​

Hi there! I am new here and I have a doubt about this. Next month I am going to have legs liposculpture (1,64 cm 51 kg) because although I eat healthy, and I do exercise 3 times a week, my skin is still sagging after an ultherapy treatment. I did it in September and It worked really well but I need a second treatment, so my question is: Should I do it before or after the liposculpture? Thanks in advance :)