@ byjove
So, she's Sun in Capricorn, Cancer Rising and Moon in Aries opposite my Sun in Aries, Cancer Rising and Moon in Virgo
Sun: Capricorn ........... Aries
Moon: Aries ............ Virgo
Rising: Cancer ............ Cancer
Her ascendent opposition's your ascendent, which means your outward self doesn't sit well with her. So your public persona, when put on, she'll react the opposite to what you want because of it. This is more affected by transits, solar return, and progressive charts.
The good news is you know how your mother works because of your moon sign. Same element is good in at least not being too intense.
The really ironic part of all this: her rising conjunct your rising. She was a lot like you at your age because of this. She may have handled it in a different way because of her moon sign versus your own, but that is one reason she does what she does.
And since her moon conjuncts your moon: she'll always know exactly how to push your buttons emotionally like any mother can. She easily sees that, but her Aries thought process is the do now think later, so she forgets this easily.
Then with your moons: square, square, SQUARE! You two are on different levels of expression for how you feel. She is exuberant and a fire cracker. You are refine and detailed in explanation. She is too direct and blunt; You think things over and only speak up when it's appropriate. She gets passive-aggressive; You get aggressive when you reach your breaking point after days, weeks, months, or years of being pushed around (yes Virgos of any Sun/Moon/Rising can blow up, but only when pushed too far).
What you both need to do is sit down together, make sure you both have food in front of you (anyone with strong fire or Aries in the chart have a hard time being patient with in a conversation). Have no distraction and don't sit near a clock. Talk to her one on one about what is going on. Make sure you don't direct it at her but say "I feel.... is hurting me when you do this and such... because I don't feel i can trust you or....". You have to make her think in the end that it's her idea (the moon is WAY more prideful then an Aries Sun because of the emotions it has).
But whatever you do, if she starts to get upset or mad or aggressive in tone, don't react the same way. Stay calm so she can realize that she is throwing it out of proportion. This will knock her back down to earth (hopefully!) and let you two be on the same page again (hopefully!) lol