Yvonne Sutton positioned herself very clearly; she had undergone years of training, true, but she never overestimated her own abilities because of it.
In terms of strength, Aiden Grant was at least ten times stronger than her.
If something could happen to Lily Shaw even with him around,
then her presence would be of no use, and she wouldn't be able to protect Lily Shaw.
The reason Old Master Grant had her become Lily Shaw's personal bodyguard, besides ensuring her safety, was because most of the people Lily would interact with would be wealthy wives and young ladies from prestigious families. They needed to prevent any underhanded tricks from harming Lily Shaw.
After all, Aiden Grant was a man and the eldest young master of The Grant Family. No matter how capable he was or how worried he was about Lily's safety, it wouldn't look good for him to mingle with women all day.
