Dead Gourami Help! Here is the thing, i had one Powder Blue Male Gourami and a Gold Female Gourami.?

So, yesterday i decided to try to breed them, and i put them in a smaller tank. I had a heater in there at a steady temp of 80'. I had one floating plant in there, and one plant on the bottom of the tank, also i have a half of a foam cup attached to the top side of the tank(for the bubble nest). So yesterday they were mostly staying on opposite ends of the tank. He chased her for a little bit yesterday, so i left them alone. Today when i got up and through out the whole day the male constantly stayed by his foam cup, he was taking loose food to the cup, and ripped of some plants. Also he nibbled on the foam cup ripping tiny pieces off of it. But he was not blowing bubbles. The Male was chasing the Female more today but not too agressive. I was watching them All day today cause i read that they could get aggresive and you have to watch them. So, i was but then i Stupidly took a nap for 1 hour, and when i got up from nap the Female was DEAD. Somebody please help me figure this out!ThanksDead Gourami Help! Here is the thing, i had one Powder Blue Male Gourami and a Gold Female Gourami.?
Well, assuming you had a true male and female, I've heard you're supposed to put the female in the tank with a cave-like structure for hiding purposes and some plants, floating and attached, for two weeks before introducing the male... did you do that? You're also supposed to condition them with high quality flake and frozed food like grindal worms or blood worms. I wouldn't have though of breeding a blue to a gold. I don't know enough about gouramis to know if they are even the same species, just different colors? But they are labryinth fish and similar to bettas when it comes to breeding, which I HAVE done. So, goodluck!