My partner (21NB) and I (22NB) have been dating for several years and know marriage is in the cards for us. We are both very close with my grandma, who invited us to her 80th birthday beach vacation in a few years. I think it would be a great proposal opportunity but my friends are split on the idea. I would obviously ask my grandma permission first, but as folks on another sub pointed out, there’s a chance that she will likely say yes because she cares about me. However, I’d like to think that we have a good enough relationship for her to tell me no if I’m crossing a line. Either way, I don’t want to be seen as a guy that hijacked my grandma’s birthday vacation. I don’t plan to take the spotlight during a birthday dinner or group event. It would just be me, my partner, and probably with my sister going on a beach walk to “take photos”. No bells and whistles, just a nice moment together. WIBTA?