Wanted kids, got married and careered at the right time to fund kids, then wife had a major mental breakdown after funking out of college, developed schizophrenia, and now has the mentality of a kid. Some days a toddler, some days a high schooler. I've been the only household income since marriage year 2, and I can't afford to deal with a pregnancy from that mental state or be basically a single parent afterward.
I'm considering adoption of teens after I retire and the assumed passing of my wife as she has a small pile of other health issues at this point slowly eating away at her.