I was on a second date with a lady that I'm getting to know, and a skeleton fell out of the closet. Bad timing.
Yup. Been there done that.
A few months after the split I was out on a date for my birthday. In the middle of dinner I get a very emotional text saying "You will finally get your wish and I won't be around anymore to bother you. I just got diagnosed with cancer".
I was so upset my only reply was "Who said I wanted you dead?" I was totally beside myself with the text (mind you, it played out a little longer than I just described... . I just cut to the chase).
Totally threw me off my game... . and I was having such a fantastic night.
A few days later I calmed down enough and my empathy level rose a bit to be concerned. I mean, hell, we were together 20 years. If she just got diagnosed with cancer I know how big of a deal this could be so I allowed her to come to the house so we could discuss her medical condition.
That conversation lasted all of 5 minutes - with the end result being she wasn't diagnosed with anything. A general practitioner suggested getting a lymphnode checked out to make sure it wasn't cancer.
In all honesty - I know believe this actually never happened. because, after that - she never did the followup, never had a biopsy - and never spoke of cancer ever again.
But we did spend the rest of the conversation talking about my new g/f (she had just found out I started dating) and how us getting a divorce would be a mistake... . how she is sorry for her impulsive decision to leave and wished it could be different. But the reality of it was - the dude she was involved with turned out to be a douche and she wasn't getting what she wanted so she turned to her old supply... . me - plus, she didn't want anyone else to want me so why not come back and put hooks back into me.
It didn't work. The only thing it did was prolong the detachment.
In your case, try and be safe and protect yourself and your daughter.