She is allowing herself to be abused and manipulated by a water sign. It's no surprise.
She needs to know and understand that he's a little insecure asshole. He's clearly taking advantage of her. You will have to persuade her to leave him and find true happiness!! The chart doesn't really matter it's the person.
When the Moon conjuncts Mars in synastry, there is a strong attraction that is both physical and emotional. We are combining yin and yang planets here, and these tend to generate much fascination and attraction. Over time, the Moon person might find the Mars person both insensitive to his or her needs and feelings, and overreactive to his or her needs and feelings! The Moon person might find that Mars comes on a little too strong when times call for more sensitivity or moderation. The relationship is sure to be an emotional one, with plenty of hurt feelings now and again, and joyful moments when the two come together again after an argument. The two people are very involved in each other's lives, and have a hard time being objective. Decisions they make as a couple tend to be very subjective and personal. A lot of touchiness from both parties generally characterizes the partnership.
Hope this helps!! ;)