Swapping houses with mortgages

[Doug Kim]

I did a search on BP and found a few posts but there wasn't alot of information about what i'm trying to do. My sister and I are in a situation where we may want to swap houses. We both have mortgages on our respective houses. It's about the same amount, around 120K on each house. We both live in the same city. What's the best way to officially swap homes/mortgages without going through the traditional buy/sell process? Any assistance is much appreciated!