No excuses. No 'reasons'.
She is a lady. A delicate flower, yes, but a flawed one. They make mistakes. They're not in control of their ovaries.
Our job is to protect them, to forgive them, and to nurture them, not to abandon them to a shop doorway and a life of selling blowjobs for a fiver to cover their crack habit.
Go and apologise, make your peace and bring some babies into the world. It's what Jesus would want.