I wish there was a way for my girlfriend to have both sets of genitals

My girlfriend is a pre-op Trans woman with the goal to get full bottom surgery. I fully support her doing this. I want her to be who she's meant to be and I want more than anything for her to be comfortable. Selfishly, I have ambitions of eating her out and strapping her. I just also have the selfish desire for her to be able to put herself inside me still. I love the warmth and the pulsing sensation. Knowing undoubtedly that she's turned on and getting to feel her cum is enough to make me cum. I just wish there was a button to suck it back or push it back out as needed.