Ask her to join you

“Actually, I can use your help. I keep ending up on other places when I try to use the shuttle controls. Can you help?”

“I can’t see much from back here, but I can probably talk you through it,” Martha replies. “You still going to get more after how large you are?”

“I have to get my butt injection,” you tell her as she had no choice but to follow you into the shuttle.

“Hope you…mrrpff…” she trails off as her face is pulled between your moving cheeks. When you finally stop, she comes up for air and gives you directions for the controls.