Excruciating pain near knee?

As one who has arthritis I can attest to the fact that floor sitting is very, very hard on lower joints. I would tie the two issues together as cause and effect. If sitting on the floor on a regular basis she is most likely get painful charlie horses. They are down right intolerable while they last. So I could see where her knee is asked to remain in a certain position for a period of time the ligaments and such stiffen. Then when she comes off the floor and moves around she is not aware of the damage to that area from sitting until the charlie horse sets in out of nowhere and zings her. I tend to think that since I can't even sit on the floor for 5 minutes without causing damage and stiffness to my legs, that she is actually doing harm without realizing it. I would suggest having her use a chair even though the kids are on the floor, its close enough to them without abusing her lower joints. Pillows, etc won't work because it isn't the surface that is causing the stiffness, it is the weight on the joints caused by the seating position. The major joints are asked to bare the weight while off balanced in the sitting down, getting up and then asked to move after becoming stiff.

Snce my mother had this ,I have deep studied this,you can reduce devolopment of disease by reducing weight on kneees,use metal rods to connect thigh and lower leg,so that no weight comes on knee,I dont know how to write drawings here, if you write to me the procedure ,i can write drawings,you study indian home remedy books,(I am also a tutorial lecturer , I assure you all teachers are with you ,dont desperate during the the times of pain, we are with you )You can e mail to me