Writing projects tend to bleed into one another. Join me in a laundry analogy.
Put a scarlet red panty into a load of white briefs, what’s coming out of the washing machine? Pink unmentionables.
There is nothing wrong with pink unmentionables. Nothing at all. But it’s nice to be prepared for their arrival on the scene.
When writing two novels at the same time, the same thing happens. While the briefs (in this case, m/m romance) will still be briefs, and the panties (women’s fiction) will still be panties, neither will come out the other end of the process quite the same shade they went into it.
So, prepare for a few pink unmentionables, and you and your two simultaneous projects should be just fine.