You might consider the benefits of having a sister-in-law..
She will not be disturbed by you being spanked...
She casn even hold your feet if they dance unseemly while you are being spanked
and their is always her lap when your wife tires, but wants ot give one parting spank
and it is advised never to come home late
Their tag team spanking will be problematic for you
so if this is the vision you see when returning home