Hi,
Here is a great site that will give you all the information you are
looking for:
http://www.seps.org/cvoracle/faq/eyecolor.html
It does sound like your mom might be right......if the eyes seem to be lightening up then it may be that your baby will have light coloured eyes and not brown even though brown are generally dominant.
I have hazel eyes and my husband has brown eyes....my son ended up with brown eyes. Everyone in my family has either blue, green/hazel eyes and everyone in my husband's family except for a few cousins has dark eyes(Portugese/Hungarian).......it is very interesting how genetics work.
Hope you find the info your looking for
