natalie's a singer/songwriter with amber mark credits. she's been very involved in her career the last few years, currently in between two tours for this year. she's friendly and outgoing with an empathetic and nurturing nature. so if you're going the step sib route with alex then i'd say these two have likely met whenever you want to say that could've happened. she'll befriend him and treat him like her own cousin, really, even if there's no blood relation.