| Quote #1
Good-bye, till we meet then—I embrace you warmly, warmly, with many kisses.
Pulcheria really loves her son. Her "sign off" speaks to this love, and cruelly foreshadows her death, to which her grief over his acts contributes. A big part of her identity is her success as a parent. When she learns of the murders, that identity is shattered.
| Quote #2
[Raskolnikov:] "For one she [Dounia] loves, for one she adores, she will sell herself!" (1.4.5)
Here Raskolnikov is referring to Dounia. Yet, he underestimates her. Although Dounia does think Luzhin can help Raskolnikov, once she knows what Luzhin's true intentions are she calls it off. Raskolnikov's love for her certainly makes this easier.
| Quote #3
[Raskolnikov:] "I've just been kissed by someone who, if I had killed anyone, would just the same... in fact I saw someone else there... with a flame-coloured feather." (2.7.135)
The kiss was from Polenka, Sonia's sister. This is not a "Svidrigaïlov moment," mind you. Raskolnikov expresses deep concern for Polenka many times. The passage also comments on the big impression Sonia makes on him the first time he sees her.