You have a child with someone else but you're judging your current partner because she had sexual relations before you?

The truth is that everyone has a past. Good God, I had a past even before I knew what having a past meant (due to abuse). Its best to let the past stay in the past. She is with you now because she loves you. Why can't that be enough?

Its a bit archaic to expect a partner to be "pure" for you and only you. I also think its a bit of self-centered thinking. What if you die? Would you not expect her to move on to someone else? If everyone had the expectation of purity in a relationship, 99.9% of us would be single for life....because yep, there's about a 0.01% chance of meeting the perfect "one" on the first try.