When West Poison Au Yeung Fung agreed to sponsor his nephew (son) Au Yeung Hak in his bid to marry Wong Yung, did the elder Au Yeung have any ulterior motives (i.e. attempting to steal the 9 Yum Jen Ging from East Heretic Wong Yerk See) when he first agreed to it, or did he do it purely out of love for his nephew/son and a desire to see his descendent happy?