I think estranged relationships are also common with mothers.

Kate - her mom turned her in.
Jack - his mom blamed him for Christian running off to Austrailia.
Claire - had a fight with her mom, before the car accident.
Sun - Jin's mother tried to blackmail her.
Hurley- constantly felt like he couldn't meet his mother's approval.
Shannon- rivalry with her step-mother.
Ben - never got to know his mother/ always had mother/female issues as a result.
Alex - didn't meet her mother until she was a teenager.
Ana Lucia - worked for her mother, and always wanted to do things independently and not always need her mother's consent.

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Because all we really need to survive is one person who truly loves us. And you have her.