Mercury in Aries opposes Black Moon Lilith in Libra, at 24 degrees. Aggressive words will puncture the facade of a relationship, and anger, resentment or jealousy will come out. Verbal challenges will raise awareness of what no one wants to acknowledge. Aries and Lilith are both instinctive energies. Here they are on opposing teams. So this also suggests the knee-jerk "no" to anyone who doesn't match the pretty picture.