The general rule is that an inheritance is exempt from being matrimonial property as long as it is ring fenced from other matrimonial property. As you have transferred it into what is matrimonial, ie, the mortgage account your husband can argue for his share of it. However you have a counter argument that the money was not produced from any efforts on his part and that special circumstances should apply for that reason. So yes, the inheritance has become matrimonial property but you can argue against him sharing it. I hope that helps. Please leave a positive rating so that I am credited for my time.