Hard as it may be to imagine old people are still people, just older.
She presumably had sex at some point during her lifetime (I don't know if your parent is a dirty toilet seat, turkey baster, was adopted or was a test tube baby and otherwise forswore it). Just for the mental image she probably at one point had to master the art of the blow job.
Listen, if you're actually distressed by this situation and were looking for genuine advice, just ignore it. Let whomever talk about whatever, and just go about your Christmas the way you'd like.
No, I’m not. It was just not the conversation that I wanted to have on Christmas.
G
Guest
lol I feel ya man happened to me too...
just change the topic unexpectedly- "did ya'll hear about the Great Russian War / minecraft/suicide wave/ (some other made up stuff)"? then start talking about that till they forget what they were talkin about
if it cant be done- go to yr room and wait till it passes
or give your grandma a tablet with porn hidden somewhere LOL