ha if divorce is on the cards maybe time to cut. i cut my easyryders around day 75 and they were good, but if yours were delayed along the line might need a bit more. i would say youre close to being done if not done already. usually people go by leaves or trics, if you have a handheld microscope or magnifying galss to look closely at the crystals they will be either clear cloudy or turning amber, clear is not done yet milky is near done/head high and amber is more stoned effect. some strains dont show this easily but worth a look anywya i think i waited till it was half milky and half amber myself but its all preference depending on the type of effect youre after.
also what colour are the pistils? the little hairs on the buds, they will turn mostly reddish brown by the time to harvest just another indicator.
if you can get some pictures in natural light(just drag them out of your tent/cab and snap a pic, up close of the buds if possible(use macro or flower symbol on a digital camera) some people judge the colour of the trics like this.
or post those up here and someone might have a look for you, good luck.
if you are cutting early you will lose alot of yield but cant tell without more info.
i am only sat here gettin baked lol I wouldn't think they will get too much bigger but ideally they should be yellowing off. check the crystals with a magnifier of you can. See if they have turned a little bit cloudy or even Amber. If so, you are on to a winner. If not.. You gotta do what you gotta do to keep the mrs happy I guess. I'm sure it will be awesome once it's dried. Not sure about yield though... I can never even guess my own. 
, you should try and make the most of it whatever you get once trimmed etc use the trimmings to make cannabutter or hash.
