Subtlety; the state or quality of being subtle; delicacy

SO... back in the day I was on a WERRRRRRRRY drunken night out with my beautiful best friend Laura.
We clambered our way on to the night bus home to good old Surbiton (Wahey!) and fell into our seats at the back of the bus - no no NOT the top level back of the bus, that would be madness, we are sooooo NOT cool enough for that seating. 
Anyway, we were happily riding along discussing the tomfooleries of the night whilst most likely basking in each other's amazing banter, when I noticed we were sitting directly opposite our childhood acquaintance (one might say 'friend')!! A friend that we had since spent many hours mocking and discussing in full length why our mothers had forced us to be friends with her. Really hope she never sees this....
Ever the subtle girl, I took my phone out (having already GASPED in the girls face when I realised who she was) and wrote the following:

Ever the NOT so subtle girl, Laura, in lieu of reading the message in her head, chose to read it with such poignant clarity that each word was an individual stab to my integrity. 

Yes, I did just Google poignant and integrity to check they meant what I thought they did.... I am still unsure. 

OH CRAP. I actually died right there and then. I wanted to throw myself off at the next bus stop. Laura of course had absolutely NO clue what she had done and still had not cottoned on to Isabelle sitting 2 feet in front of her.
Thus.... the embarrassment did not end there... following this came a certain amount of "What?! I don't get it. Isabelle?! Isabelle who?! Why are you showing me this?!" "Why are you telling me to shush... tell me" etc etc etc.

I should probably mention that Isabelle had of course recognised the two drunken wrecks from her youth the minute we stepped on the bus.
After a painstakingly long bus journey trying extraordinarily hard NOT to catch Isabelle's eye line we finally hopped off the bus.
LAURA YOU ABSOLUTE CRETIN.