Song Ci actually had no idea that Qi San, her future grandson-in-law, had such a scandal. First, the marriage grant was inevitable, and even if he did have a concubine, he couldn't defy the imperial edict.
Secondly, she was somewhat indifferent and hadn't thought about interfering in Song Ruqi's marriage matters, so naturally, she didn't ask in detail.
As a result, the other party indeed had an old concubine.
Well, in Song Ci's modern mindset, it's just like the other party has an ex-girlfriend, which is nothing; what's important is the future. The only slightly troublesome part is that this old concubine might be Qi San's first woman, which is tricky.
