Go with it. Do not make any excuses for it with the couple. the lighting is what it is. Process them as best as you can, and realize--that is actually a "type" of lighting condition. Some people do not mind it. Go for the light, bright, airy look. They will look at their expressions much more than the highlights. Only photographers fixate on highlights. Real people are much more keyed in on other aspects.
I'm on my iPad and not at the computer -- otherwise I'd hover over the bright spots to see if they're actually block wn (they look blown) or see if the is any recoverable detail in those spots.
If they are blown then your screwed... blown means no recoverable detailed and it's not a matter of knowing the tools well enough -- the data is lost forever.
To avoid blown hightlights you meter specifically for the highlights ands expertly meter the shadows. Make sure they are within the dynamic range of your camera. Use fill flash to increase the light in the shadows and that will let you back off the exposure to eliminate blown highlights.