From CS to normal delivery

I think if you are CS at first, there are less possibilities na pwede kang magnormal or papayagan kang magnormal delivery. I know someone, CS sa first child. After 10 yrs nagkababy sila. Sinubukan nilang magnormal delivery ulit where in pumayag ang ob. Pero pagkaire, bumuka ulit ang sugat niya mommy kaya CS ulit talaga.