"I need you to be honest with me about these things, so don't worry about speaking frankly. No it won't be like this but we can gradually increase the size until you can take a small dildo, then gradually increase that until you can take a real cock" Eterna explained, she herself had never been a big fan of anal sex as she did not receive any of the pleasure. Not having a prostate made anal sex seem a little pointless to her but Kenzi was a slave and so it shouldn't be all about her pleasure.
"We'll take this slowly. You'll stop noticing that it is there soon and then we can try the next size up"