My SO and I had sex around 12am last night/this morning. I got a positive opk around 11am on the 12th. My SO has delayed ejaculation, and has never come through sex. Last night he got himself off and decided to try to finish in me (we are trying ways to help overcome his DE). It's the only time he came in me, and although he did a few thrusts, I think most came out with him. I went pee and no semen came out, so I doubt it got far enough in.

What do you think the likelihood would be?