Not many girls pose pregnant and almost all of the ones who do won't do hardcore. There have been few exceptions. Nathaly Cherie fucked in a preggo shoot. So did Shyla Shy. Kali West at eight-months pregnant jacked off a cock but didn't want the dick in her pussy. Kali returned later to fuck after giving birth.
Katarina Dubrova is a different story. The slim and stacked, beautiful blonde had a seven-month bump when she fucked. Her slim figure made her bump look bigger. Her man creampies her at the end, which is fine.