Today, I want to make peace with my girlfriend, her sister and my brother-in-law. Drinking with them for the first time. Say what, how to propose a toast? I'm not very good at talking.

You are somebody else's brother-in-law ~ ~ pour wine for her sister, and pour wine for her brother-in-law. Don't be too restrained. You can only pour it once, because your brother-in-law pours it for you the rest of the time ~ ~ Because your cup mouth is higher than your brother-in-law and sister, or because you are older ~ ~

Actually, there is no need to propose a toast ~ ~ ~ but you have to say something about drinking, such as how much your brother-in-law can drink. Today, you don't want to drink too much, you just want to drink beauty. Don't get drunk and let your sister scold you if you can't get home. Actually, if you drink a little wine, everyone will be the same ~ ~

I don't know if my answer is satisfactory. I wish you success.