I think right now she has this softness towards him as she is the one who has started to think about him.
However after he shoots her husband, that softness will definitely go.I think the main way she is going to fall in love with him is to understand why he like this.She needs to know why he is this violent and angered person and I think the way she will fall in love with him is when she notices there is a softness in him.He will have to do something that's going to touch her heart and make her question her own thoughts about him. Because after he has shot her husband, all that softness that she had for him is going to go.it will take time as we will see her go through a stage of anger and hate for him (well he did shoot her husband lol)
To understand why he is like that, she needs to know his past .. but I don't think the past will be out anytime soon. Besides, when he gets a whiff of how she affects him .. he is going to do everything to stay away from her .. maybe that's the time he gets intimate with Laila?
It will take a long time though.. no doubt about that.