Can cytomegalovirus infections be transmitted to my family members?

Rarely. Cytomegalovirus (CMV) is a herpes family virus, which is often passed by direct contact. The most common form is infectious mononucleolsis which is caused by CMV infection -- and it is passed by direct physical contact. So, it depends what the type of disease you have and what their immune system is like. In general, nearly 80% of people have immunity to cmv, which means they have been exposed.
Yes. It is transmitted most often by mouth-to-mouth kissing. Most people have already met CMV (and thus you cannot make them sick again), and many continue to shed the organism on and off for the rest of their lives.