She´s a slut, ofcourse she does!

You hear her moan in pleasure as you add Another finger. You spread them and feel her asshole stretch a bit. You then ask her.
"Is this your first time Anal?"

The Slut shakes her head.
"Second?"

She nods. you smile and place the dildo at her anus.
"Tense up first as if you´re gonna take a shit, then relax when I tell you to."

She tenses up and her anus almost pucker out to kiss the tip of the dildo. You give it a firm pressure against her anus. You tell her to relax and the head of the dildo is almost sucked in. The Slut giggles in a sexy manner and wiggles her ass a bit. You stop her with a hard smack on her slightly red ass. This makes her yelp and clamp her ass down on the dildo.

You push more and more of the dildo in until it might disappear up her ass. She now has 7" of rubber dick up her ass. You smile and push it all in. Her anus closes somewhat around the end. It´ll take a lot of effort for her to get it out now. Then you fetch a short but wide buttplug and insert it up her ass after the dildo. Her anus clamps down on it, plugging herself.
"I didn't have any buttplugs this big or I would have used them. But I Think you´ll like it eventually."

You move your hand down to her pussy...