i urge you to read this.
http://www.associatedcontent.com/article/1047180/the_lie_...
the problem with inducing pregnancy, is that baby obviously is not ready to be born. the lungs should be developed completely before baby is born, or there is a great danger to the baby. obviously, it seems to have 'worked well' to induce labor and or take babies by c-sec early, but at the same time that these rates go up, SIDS rates go up. coincidence? maybe not.
just let your DIL, your son and her doctors decide what to do... she knows whats best for her body. if the doctors were concerned with her blood presure, they will take care of her. and of course shes uncomfortable :P shes almost ready to have a baby! it just plain IS uncomfortable.
just tell her to take it easy, rest, drink lots of water (dehydration is common in the end of pregnancy and it can cause blood pressure to rise) and breathe. she shouldnt be worried about cleaning or cooking or doing anything right now except taking care of her. she should take walks as she is able, and stretch gently. doing squats might be uncomfortable, but i think that it helps open up the pelvis. also, if shes expecting a vaginal delivery, she can and should use oil or vaseline or something to rub and stretch the opening to try and prevent or minimize any tearing she might experience.
good luck to her!