Hi, I’m a male with a female dog. Recently I’ve been trying to ease into penetrative sex with her. She’s around 23 inches tall and 55 pounds. I’ve tried fingering her with only one finger with foreplay rubbing her clit, and I’ve managed to go about 1 inch deep, hold it there for long periods of time, but after pushing slightly further, she gets up, I believe due to discomfort. It’s quite frustrating as I feel her vaginal contractions on my finger, the pulsating feeling that I hear is so addictive. I believe she is un-newtered, and that she’s a virgin, for both humans and dogs. What should I do?