I dont think she was fired from H!P though. Because it was done in a respectable manner, she should be just fine to return. However, it's not well-looked upon. Why do you think Momoe Yamaguchi never returned? And yet she is still as famous as ever.
I doubt, that we will be seeing much from her for a while. Same with Kaori once she starts to show. Plus thinking about them getting bonked is just weird. O_o Even for the perve in us. It's alright when its imaginary but when you know its real, its like 'wha?!'