@Fasder
For the handjob, it felt static since her hands did not move up and down. It only looked like she was grabbing his penis even though the dialogue said she was giving him a handjob. Now I'm not saying you need to animate but with still pictures, you need to convey action. Three different still images with different penis holding would do it, I think. One at the base, one at the middle, then last at the tip.
Add blowjob. (same thing here, convey action)
When she undresses, she needs to take off her top (1st image) then her panties (2nd), and total nudity (3rd).
Fondling her breasts because they are very nice breasts, add option to lick/suck on them.
Finger her a bit to check if she's wet (she is).
Since she initiated the sex, cowgirl position (same thing again, convey action). First penetration image then have her move her hips like in those Japanese AVs where they don't move up and down but forward and backwards grinding on the MC's penis.
She cums, MC cums inside. She lays on top for a while kisses the MC on the lips and hints a repeat of the night. (we would prefer a repeatable scene that can be triggered let's say Friday night after working if you haven't written anything to advance her story yet). MC carries her to her bed or not (depends on the heart values, I guess). Then the MC leaves.