Yes, this is possible. However, you will absolutely need to be examined for its feasibility. Liposuction is perhaps our most powerful tool to change the shape of people's bodies and that's most likely what you'll need to "rob from Peter to pay Paul." In other words, you may need to take form the...
SO don't worry, anything you have had put in, added to some swelling post op will feel tight at day 2-7. As long as it isn't hot and red and painful then go with it. Once the swelling starts to fade things will feel a lot more normal but don't expect a soft contour for 3-6 months at least....
It would be better if you would do a thigh lift. This would give you the results you would like to achieve, fat transfer will only make your thighs bigger.