Title should be “Dating Before Divorce Final”

So my STBEW and I have been going through a long and painful divorce for about 2 years now (on/off thing). We have been living separately for this same period but share 2 kids

She has been dating some guy who she calls a “friend” for about 3 months.

I have been sorting through OLD apps for about a year with no intent to actually meet anyone. But now I’ve found someone I want to meet and we have a date tomorrow.

I have not disclosed with this woman that my divorce is pending. I’m adored it will scare her off. But my marriage is really over and has been for a long time.

When do I need to tell this woman about my marriage? For all I know the date may not workout. But as a general rule, what is the timing? It’s not exactly my lead in.