My wife is 8 months pregnant for the first time. in 8th month we experienced some secretions coming out of her both breasts. is it normal?

Sure: Its nothing to worry about; in that small, and i mean remote, chance she gets headaches and vision changes, and the milk shoots out, not expressed, than it could be a prolactinoma. Thing is a prolactinoma isa major source for infertility. She's fine, congradulation's.

Yes: Laceration can sometimes occur prior to delivery depending on nipple stimulation.