/lit/ - Literature

How the fuck do I imply I'm laughing, being ironic or sarcastic in a semi-formal letter to someone mature and with a serious subject? I'm not going to fucking put a smile on that, a lol or a (laughs).

I don't want to sound like a fucking cunt prick asshole bitch ass bitch. Ex: "I do understand the issue at hand but honestly, if one of two of them did die it wouldn't really matter".