Stimulate her imagination, ask her how she thinks a big cock would feel, Tell her she can have sex with a man that gets her excited without guilt or worry of upsetting you, try some role playing using dildos to stimulate sex with different men. Ask her how hot it would be fucking someone else, How fun would a first date be ending with hot sex, spark her curiosity, encourage her to be bold, tell her to look at men as sex partners wanting to seduce her. Tell her this not the time to hold back, but embrace her sexuality, her sensuality and act on it. There are men wanting and waiting to be with her, their main goal is her sexual satisfaction! How exciting is that.