I think you are doing fantastic! I like your attitude. Not focusing on quick weightloss, but the process and the lifestyle changes are the things that are going to stick with you forever. Even little things like playing Wii fit games with your son; they all add up and are going to benefit both of you in the long run.
BTW, I have lost just a little more than you - but in almost a year (well, about 10 months)! And I am ecstatic. I feel so much better, and that is what it is all about for me. Wellness, and feeling well. I felt like crap 48 pounds ago. Now I feel pretty good most of the time.
Keep it up chickie, you are on the right track.