Janine left a couple weeks after the wedding, she was struggling with everything and was sure that Michael was cheating, he wasn't. She thought Michael was only with her for the money
not far wrong there, and offered him a way out, giving him a suitcase full of cash (can't remember how much) she left him over night to see what he would do, any who the baby woke up and michael took her down stairs, when Janine woke up she noticed michael gone, and went to the babies room where she was gone, she ran down stairs and looked first at the table where she had left the money (it was gone) and then around the rest of the room. Where she saw Michael with the baby, he pointed out to her but her first thought to was of the money and not the baby 
He gave her the baby and walked out
All she wanted was him to love her 
Any who she packed everything up called a taxi, and when Michael came back she had it out with him, passed him the baby
and left!! No one expected her to leave scarlett!!
Also he went out onto the street and whispered 'but i love you' but she of course couldn't hear as she was in a taxi been driven off to the jungle!!