That is a very good point. Now, help me with understanding how this relates to topic at hand. Perhaps this is what I am not seeing.
To attend or not attend a baby shower is not a sin. All that occurs at baby showers is food is eaten, drinks are drunk, and gifts are opened (with the occassional annoying baby shower game). Gifts are usually for the baby or the baby’s nursery. Sometimes a mother receives nursing pads, a healing gel (b/c of nursing issues), pumps and bags for breast milk, and on occassion, a massage, spa, hair, nails, gift certificate for relaxation before or after giving birth. So, the gifts do not promote sex outside of marriage (they don’t even condone sex ouside of marriage). That’s the basic of what the shower is all about and what occurs at the shower.
People are free to choose to attend or not for many reasons. Now, the scandal some see is that the mother is being rewarded for her sin (premarital sex = baby shower, they’re missing the whole becoming pregnant and a new life beginning part, which is a major factor). Many fail to remember that God has entrusted this woman (and the father) with this child to make a choice in doing what is best for the child. God made a miracle happen from a sin ( one of the sweetest lemonades from lemons).
Those who are concerned about scandal only look outward when discussing scandal (the mother and celebrants are causing scandal) without looking inward at the scandal they are/maybe causing as a result of their actions/words regarding said shower (or lack thereof). The pregnant woman would like for others to join her in celebrating the new life within her, not her sin. The person who is against this idea can choose to not attend without explaination to anyone for the reason they choose not to attend. However, one slip of the tounge and their reasoning can turn into scandal or even worse, sin (bear false witness against thy neighbor a.k.a. gossip).
Also, a complete lack of charity can (and a lot of the time, does) lead the sinner even further away from HE who is TRUTH and the Church HE founded. Taking an action or saying something that causes another to have a little more disgust for the Catholic Church IS SCANDAL (which is why the priest molestations are scandals in addition to sins, some who were not directly molested but found out about the scandals were disgusted with the Church to the point they left).
Admonishing the sin is a good thing, but if you aren’t a trusted person of the sinner, than you will do more damage, therefore causing scandal. Remember St. Paul stated that to convert the Jews one must become like the Jews, to convert the Gentiles, one must become like the Gentiles. HOwever, as he stated, one must do this without sinning. Scandal is not always sinful, sin is always scandalous.