Rabbit behaviour help?

i have 2 rabbits one male and one female. i had my male rabbit first from the age of 7 weeks. in early febuary (he was 10 months old) i got him neutered as i wanted to get him a female friend. in mid april i got a female rabbit that the previous owner thinks is over 1 year old. i done lots of research on getting them used to each other and bonding them. on their first meeting my male mounted the female and he was showing dominace over her, the next time i put them together he was submissive and letting her do all the grooming and bossing around. they both slept outside in a shed with a hutch each and they had a big outdoor run joined to the shed where they could both play together. about 2 weeks ago. i started letting them sleep in the same hutch (the males hutch) and they were getting on ok. about a week ago i started to noitce the female biting the males bottom and just bossing him around, he never bites back and just sits there. so 2 days ago i went out to settle them down for the night and feed them and when i lifted the lid of the hutch to put the food in the bowl the female starts grunting and growling really loud and then lunges at the male biting him. everytime i go to put my hand in the hutch instead of biting me she bites him. i seperated them again into seperate hutches but let them play together during the day but she still growls and grunts everytime i go to put my hand into the hutch or if i even look at her when the male is beside her. .......i dont know what is wrong with her and why she is acting like that. i am getting her spayed anyway in about 3 weeks so im guessing that she may stop this behaviour? PS she always grooms him and puts her scent on everything