How Do I Ask Him?

How Does My Sister Ask Her Husband To Get Pregnant? She's So Nervous And She Asked Me To Serectly Watch Her HAving ! An I'm Like Nooo! Ewww..! She Thinks I Know More About It Then her! But Really I Don't I'm Only 14 And She's 23! How R Way She Can Make A Move On Him Or Ask him! SO She'll Stop Bugging Me??? Please Help?