Yes, there was a full-blown fight. Yang Baifu originally felt somewhat guilty towards Yang Baichuan; after all, he really did hit him hard, and it was quite possible that his second brother would become a eunuch. He felt that not even his parents might forgive him for that.
But then Feng Family came up and scratched his face, which was something he couldn't tolerate. Having a chunk taken out of his ear was already disfiguring, and if he were to be scarred further...
Yang Baifu depended on his looks to get by, after all. Widow Lu had said she especially loved looking at his face.
So, when Feng Family was relentless in her attempt to disfigure him, Yang Baifu exploded. Propping himself up, he leapt to his feet and slapped her across the face, "Damn it, if that bastard Yang Baichuan dares to compete with me for a woman, he deserves to be crippled... and if you dare to lay a finger on me again, I'll cripple you too..."