Homemade beef/bone stock...its stinking up the whole house and making me gag...what gives?

Okay so I've been reading this book and it gave me some good ideas as to how to change up my diet, i.e: making homemade broth. I thought it would be no big deal - but no!! My "broth" has been simmering for 3 hours and the whole house stinks. Any ideas as to what I'm doing wrong?? I roasted the soup bone in the oven for 45 minutes, then put it in a crock pot with water and a splash of vinegar. The smell is soooo strong - and no, the meat is not bad. I bought it today....help me out if you can....