When you're digging into your retirement, you've crossed a line that you probably told yourself and your spouse you'd never cross. Remember that financial ruin comes slowly, then all at once. Stop it.
Assuming you're living as frugally as you can, take every penny out of the company you can. Without you, there is no company and the worse your personal financial state is, the worse your decisions and execution will be. I'd give zero shits about what your partner or anyone else with a paycheck thinks of that.
But to Neil's point... do you really understand your market? Do you understand how you can get to self-supporting revenue? I don't know what the investment scene is for non-profit SaaS in Hartford, CT... but I've got to imagine it's not easy and generating revenue from the company is critical to your capability to continue with it.
If you can't see a way to do that, then stop working on it for a week. It'll still be there. Go think about what you'd do if you weren't working on this... just don't work on it.
After a week you should have some new ideas how to make it work. If you still can't realistically see a way to sufficient revenue generation and you don't have immediate investor interest, then read Shobhit's response again.