Linda didn't know Hope very well, but she knew of Hope. And it had obviously shaken the poor girl when her father and boyfriend got sent home. Based on what Cami said, Linda always assumed Klaus loved his daughter deeply. This proved her assumption had been correct.
"I've met her, but I don't know her well. Cami has mentioned her to me a few times here and there. She seems beautiful, smart, and caring." And she adored her parents, which Linda liked.