Establishing and maintaining healthy boundaries is crucial in any family relationship. This involves setting clear expectations, communicating openly, and respecting each other's autonomy. Healthy boundaries help prevent manipulation and promote a positive, supportive environment.
It sounds like you’re referencing a concept or a story title, possibly from adult or dark fiction genres (e.g., “my step sis swallows 7” and “my pervy family manipu” — perhaps “manipulate” or “manipulation”).
In the context of your keyword, if you're feeling uncomfortable or manipulated by a family member's behavior, know that you're not alone, and there are resources and strategies available to help you navigate these complex issues.