The questions that Dalubaba ask are good questions.
I didn't mean to shrug them off.
The fluid your penis produces when you are excited comes from the Cowper's glands. It is a lubricant. It does not have sperm in it.
When you ejaculate, sperm is mixed with semen. You said that you did not ejaculate, so the fluid she touched would not have sperm in it.
Your sexual activity is too mild to conceive. However delay of menstruation by 11 days is worrisome. Is she regular in her menstrual cycle? Another point to be considered is whether sexual activity was done in her fertile period? I hope some member will give their thoughts in this matter.