Despite what modern feminist society teaches, she’s your property and your toy. You own her. So the responsibility for her happiness rests on your shoulders.
To keep her happy, use the BAR system. Be sure to give her Boundaries to make her feel safe. Show her plenty of Appreciation like hugs and kisses. Give her a strict Routine to keep her from over thinking.
When she has these chains around her, she’ll feel safe and loved.
Just ask her – there’s freedom in chains.