Bunnah Lover sorry that sounds rather smelly and unsantirary. How often do you change it? Doesn't the pee just pool in the newspaper.
In fact its usually not a recomended bedding at all. There are a variety of other bedding options that would smell a lot less and be safer for your piggies. Plus your Mom wouldn't complain as much.
In fact I wouldn't be going out on a limb in saying that if it wasn't changed frequently it could cause pododermatitis where the acid in the urine is eating at your piggies feet.
http://www.guinealynx.info/pododermatitis.html
Guinea pig Lynx opinion on newspaper.
X Newspaper
While some people find it useful to line the bottom of the cage with newspaper and place another bedding on top, newspaper alone is a poor bedding material. It does not absorb liquids well, does not control odors, and must be frequently changed.
So I'd really switch to something else.
Bedding http://www.guinealynx.info/bedding.html