The rule older_age / 2 + 7 pretty much works. With 36, that's 25, so barely OK. I actually had a 26yo gf when I was 37, very close... but she's a bit fucked in the heda which is essentially why we're not together anymore, and she's had 20+ years older bfs before and after me.
Back to OPs grille, she's easily attractive enough for a Bernd, but she seems either psycho or at least unpleasant just from her facial expression, so don't really want.