My husband just lost his brother but they doing tests so levaya won’t be for another 2days. I have my cousins engagement tonight am I permitted to go?
You are allowed to go, however your husband may not. The reason is since you husband has dinim of aveilus already. Regarding yourself, you have some dinim, but for you they only start after the funeral, and not during the aninus period.
Hamakom yinachem eschem b’toch shar aveilei, tzion v’erushalayim.
Y:D 341-5, 374-6, Erech Shai, Terumas Hadeshen 395, Badei Hashulchan 374-6 Biurim D:H KOl shavua, Divrei Sofrim ibid.