The chick has no problem taking it in her mouth and sucking it, she cheats on her husband knowingly. If she needs to swallow, she swallows, if she needs to expose her buns to passing motorists, she'll do that too. The blonde acts like a bitch, ready to do any order of her lover or master.
The sister is not shy with her brother - he has known and used her body for a long time. She often bailed him out while he didn't have a steady girlfriend. Now he has a girlfriend, but he enjoys pleasing his little sister. And he always comes only in her mouth - she loves the taste of sperm.