How will my car insurance change now that i am married?

Hi, I just got married. I am 30 and she is 23. I pay about $76 a month on my car , she pays about $125 and both are full coverage. Mine is with Geico and hers is with some other company. I will get a quote in a few days, but I was just interested, as to what our insurance rate will be when we combine, probably with Geico. Is hers going to make it very high or what can I expect. Thanks.