He was a modest guy, and his sister took him and corrupted him, made him lick her, and in return she did not even take his dick in her mouth, just masturbated him and he cum copiously. But her cum is arousing. So she squirted just from the toy. It's a good thing she didn't put it in her brother's mouth, or he wouldn't have realized it at first. But I think she will teach him all the positions and he will become a professional cunnilingus.
Well I do not know about the undeveloped ass, in my opinion a man very intensely and without preparation fucks a lady in the ass, and she gets a lot of pleasure out of it! So I think the ass is quite well developed.