If you dislike her father-in-law is expressed in some, in your opinion, ambiguous compliment your address - for example, that today you have washed the dishes much cleaner and faster than yesterday, it makes sense to simply take the question to heart. Try to understand his mom or dad - before their son belonged only to them, but now he has a wife, to which they just need to get used to.
In addition, your husband's parents, and especially his mother, just jealous it to you, which is also very understandable. Likely to resolve this situation will help you time - your new family eventually feel the warm feelings to you and will treat you as her own daughter.
The second and more serious situation - your mother-in-law and your do not accept you into their family and at every opportunity, trying to provoke a conflict. In this position, there is at least one and, but an obvious plus - your husband clearly sees things this way, and you have the right to ask him to quietly talk with their parents. The purpose of such conversations may be one - your spouse should explain to parents that he was already married, and that they, if they really love it, must come to terms with his choice and leave you alone.
On your part, you can try to build a normal relationship with your mother in law, which is usually the case initiated such scandals, with the help of small feminine wiles. For example, you can ask in-law to teach you as much as it is, to cook or make tea jelly. But do not overdo it - outright flattery not only contribute to the normalization of relations, but also cause excess storm of negativity in your address.
Very often, the parents of her husband to the daughter relationships begin to warm up after the birth of his grandson, after all grandparents are usually willing to often see his young heir and take part in his upbringing. But if this does not work, and you, living with them in one apartment, do not want conflicts seen growing up the child, the only one way out - to disperse and sometimes visit each other's homes, making an appointment in advance.