selfishness

It seemed she thought it only natural for him to have his own way.

Nothing satisfies her unless it goes exactly her way.

She always insists on having things her own way.

She has that big house all to herself.

She doesn't care about other people. In other words, she's self-centered.

She's not selfish at all.

She did that not for your sake but for her own.

She tries to do everything her own way.

She's acting on some selfish motive.

She had the spacious room all to herself.