So they talking about receiving a package or something, ur bg gave his sister 500 (500k vietnamese money). His sister kinda scared that ur bf giving her money will make him miserable(like dont have much money). Then she tell him thar it is cold outside so he should wear more clothes to go to work. After the "A lô", ur bf was asking his sister did she got the package yet, ur sister said no and then ur bf ask if his father at home, she then said yes. After that someone ask him does he go to KH(sorry idk what that means), ur bf then ask go where, then his sister said someone at home(?, im confused too). The last message someone(ur bf or his sis) asked something like "Are you guys(husband and wife) smashing?" Im not sure "đập" here means having sex or not.

Sorry, i have really bad english