There is also a lot of clinical evidence around this phenomenon. Read a lot of articles right after BD that suggested that 49 is a very dangerous age. Lots of clinicians talking about clients leaving families at 49 for that final "chance at life".
^^^^This. Yes. Holy Crap, in spades. The pending "50" thing with my own W was HUGE. She started talking about it almost nonstop, ohhhh... right about the time she started her descent into WW-ness and then her A with the OM. "I'm going to be 50!" She would lament. "You're not even 49, yet" I (the old me) would say.
Never understimate the impact a pending milestone birthday can have on a woman.
H53/W51, R-ing 4/'18
"Do not arouse or awaken love until it so desires"-Sg.of Sg 2:7
"So oftentimes it happens,that we live our lives in chains, & we never even know we have the key"-Eagles III 1:3