A good question ,How does the feeling of wanting to go out start,
maybe it is slightly different for different people but it may have something to do with when being at home is just not enough and there is this pull at you that you want to be seen and communicate with others as to make you fulfilled and feel normal .
And how can you stop this happening , not sure that you can but i expect you can dampen this urge a bit by mixing with others in a limited way , maybe a cub or visiting someone .
Will this stop a wife/so from thinking that you want to become a full time woman , maybe and maybe not it would all depend on how open you are with it but if that desire is there then it is very difficult to find a happy medium where both are going to be happy most of the time .
It stands to reason that the more you dress and the more you want to go out then the more a wife/so will suspect that you wish to become a woman but this wish/desire if you have it can have little to do with the dressing , if it is there by not going out will not stop it .