Is talking about sex with a future boyfriend rude/wrong/disgrace?

With all do respect and dont mean to be rude, I would prefer a response from ppl who respect themselves and body. I have this friend that is talkin to this guy she really likes and sounds like she might have possible high intentions of dating him as he feels the same about her. They recently felt that they crossed a comfort level where they could talk about there sexual feelings and thoughts towards the other. Now she feels a little guilty, feeling that she has disgraced or disrespected her family or what they raised her. I told her she did no wrong doing or disrespect as long as they both feel they crossed a level where they feel comfy talkin about it, as long as she doesnt talk about it with everyone, or talk like that with every guy she talks to - there is no wrong doing at all and that her family wont find that as a disgrace.. Am I wrong? please be honest. Thanks ;)