At the end of the 2 years you will want to apply for ILR indefinite leave to remain (unlimited stay in Britain). At this time you will need to prove that the 2 of you have been living together consistently. The Home Office will want to know for sure that it isn't a marriage of convenience but a TRUE marriage. I would advise it is ok to visit home for emergency reasons or for a brief holiday but best to go together. Basically always keep in mind that after 2 years you will be applying for indefinite stay so you need to build up your "portfolio" now. Best not to do anything (unless necessary and can be justified with evidence) wich might jeopardise your application in 2 years time.
