jws are good ppl and its not a "filfthy cult" like the kingston order or hale bop but having said that, it is a cult mindset with plenty of double think and cult speak
her beliefs will ALWAYS trump yours. you WILL sacrifice your wants for hers
kids will be taught at the kingdom hall that tou will due at armageddon along with your family for not being JWs
jws will be SUPER nice to you, and some will genuinely like you, but it will be limited to "encouraging" you to become a JW
one thing that is rarely discussed here is the intimacey between husband and wife that comes from sharing goals, talking openly about where we are and where we are going, being philisophical with each other, learning to be happy together as a team. this is virtually if not completely impossible when one mate is a jw. the answer to every question or inquiry will always be a prepared paraphrase of watchtower rhetoric. she wont go "deep" with you or share innermost thoughts because she will suppress those thoughts or not have them at all because jws allow the watchtower/GB to do the thinking for them.
jw "happiness" comes solely from dutifully completing their GB sanctioned routine each week, a routine you wont share or want.
it will be very difficult to be deeply happy in your relationship unless you become a jw with her. but then you get all the baggage that comes with that and cutting out your own familiy
good luck my friend,