Kevin Federline is worried about having a child with Britney Spears, his ex has claimed.
Shar believes the new arrival - due in October - will put unnecessary stress on the pair's marriage.
She confessed to Britain's More magazine: "I think they should have got to know each other better before they had a baby.
I don't know if Britney realises how hard it will be.
"A baby's not a dog, you can't just put it away It's going to be rough.
Kevin's told me that it's a lot to handle, two babies in one year He's overwhelmed" .