The Stranger part 2 - vague scenes

In the chapters 5 and 6 of part one and 1 and 2 of part two M.M. meets Reymond and we learn that they become "pals". M.M. helps Reymond write a letter to his "mistress" which inturn ends unsettling. Reymond wins his mistress back, but instantly beats her again. What becomes vague is exaclty what happened in Reymond's appartment, and then later when he was being "investigated". every thing occured in such a small amount of time that we hardly remember it.
 I suppose the point that Camus is trying to get across is live in the moment of now. Camus implies that Reymond and his mistress engage in sexual affairs, then he beats her. What we don't notice is that Reymond is acting upon his immediate feelings. First the sexual temptation, and later his anger of his cheating mistress.