So we are going to start with what you want to read about! The sexual relationship could be strong since both ruling planets are linked to your sex lives. But the problem you will have here is that things on the surface will be fine, but after a while, you could start to hurt each other, and become a little aggressive towards each other!
Then you have the trust factor, and here there could be issues for many years, the Librian has problems with insecurity. Libra likes to be loved and they seem to want approval to all those around them. Aries, does not much time or thought into their actions, the lack of conversation about every single detail would arise suspicion to to the Libra, so this combination on trust is going to be hard to work through, if they can work through it.
This couple can understand each other well when it comes to emotions, Aries can awake Libras ability to show them because of their own openness.