Are you playing 0.2? missionary has been added in 0.2, doggy in 0.2.2 and are there since then how come you don't have that options?
Let's go through it once more:
Do you have the dick interaction unlocked? Dex 4, 20k cost upgrade from the shop
If yes:
- start the night
- take off blanket completely
- move hands to sides
- unbutton the shirt
- remove the panties
Now either:
- spread legs, choose dick and fuck
Or:
- raise arms above head
- click waist to turn her over
- shift legs to adjust ass up
- choose dick and click anus or pussy for anal or classic doggy