My sun, Mercury, and Venus are in Aquarius. My sun trines Uranus on my MC. My life does not have a lot in common with your mother's.
So my question to you is, why is it even important to stereotype your mother as typical of a given astrological sign?? Obviously the life of a human being as expressed in a horoscope is made up of hundreds of data bytes, not some kind of pop-schlock sun-sign over-simplification.
Would you say that Abraham Lincoln or Thomas A. Edison were "typical" Aquarians? What would you see them as having in common with your mother?
I think it would be more helpful for you to learn to synthesize your mother's chart as an entirety. The hard aspects usually indicate the major life issues that the person has had to face.
It may be useful to think of Aquarius in the following basic terms.
Fixed Air Sign. The world of ideas is very important to the air signs. Fixed signs generally like to stay the course, whatever it might be. Consequently, once having decided that an idea is correct, Aquarians don't like to change it. This might be an old idea (conservative Sarah Palin is a hyper-Aquarian) or a novel idea that is ahead of its time.
Saturn is the traditional ruler of Aquarius. Especially if Saturn rules the house cusp of the Aquarian sun, via Capricorn, you may find an Aquarian to be more aloof and pragmatic. (Supposedly Aquarius is the sign of the scientist or inventor.)
Uranus is the modern ruler of Aquarius. From this comes the Aquarian reputation for being off-beat and quirky. Uranus has a lot to do with liberation from the strictures of the past and with novelty. Hence we find Lincoln signing the Emancipation Proclamation and Edison inventing the light bulb.
Conversely, Aquarius is not a water sign. It's not into warm fuzzies or emotional closeness, although other planets in the chart might be. Unless there is a sprinkling of water elsewhere in the chart, Aquarians can appear emotionally cool to other signs. (But on planet Aquarius, this is normal.)