Dude, with no training history I think fat fast and 4 x a week compound lifting will cause burn out or worse.
Why dont you give this girl some knowledge she can use? After all- teaching her to drop fat for her wedding day is all well and good.
But- educating her on a healthy lifestyle for life is so much more.
At 200+ pounds she will react well to any consist training- why not let her enjoy it too?
Give her “7 habits of effective nutritional programs” by berardi. Get her to take a food diary. Possibly in stages- you know, write the food down first. then write down the macros if the 1st stage is happening on a daily basis.
Get her on something like the beginners blast off program or a very simple 3 day split. Dont put too many difficult exercises in. Remember that she is likely to be self concious squatting etc. when carrying extra fat- try to formulate a program that does not draw attention to her in the gym- and lets be honest, a bona fide T-Man/Woman plan WILL draw attention.
5 months is more than long enough to drop all her extra fat. Let her add in some swimming etc. if she enjoys it- its all good!
Bottom line- just get her eating cleanish, doing some sort of weight training, some sort of cardio and the weight will drop off.
DO NOT make her feel self concious when lifting. DO NOT make her feel like a loser for having the occasional cheat meal. DO NOT confuse her with massive compound lifts.
If she has no previous exercise history she will react amazingly well. There is no need to pull fat fast out of the bag. Look at how many people fall off the wagon- look at how little it actually teaches you.
4 x week training is a lot for a newbie especially if you are going to crank up the compounds.
Most women who havent trained cannot crank out real pressups let alone anything more complex.
I hope this helps- i dont mean any of it to be critical but in your enthusiasm you run the risk of swamping her with info and losing her to boredom, fear etc.
What I am trying to say is that just stopping the habits that got her to 200lbs will cause her to drop fat…introduce her to training nicely and she’ll stay