Ha - well, #2 is true of asking a sheilah about anything, isn't it?
Personally, I'd ask before leaving - just like I'd discuss my choice of going to kollel with my rebbe.
KG - I agree, but I know lots of people who are choosing to do it because they want to, and by the same token, if they had to, they'd leave. As kedusha mentioned, people with heads on their shoulders know that if it's not working out, you leave. My sister married a long-term learner, an incredible guy who's really committed - and that's what she wanted. Yet, if things got tough, and my sister was having trouble handling it, he'd go out and work. I'm sure it wouldn't be a split-second decision - they'd discuss it (like any other major lifestyle change). But that's what intelligent people do - they make decisions based on what's the best thing for
them to do at
that time.