Unsatisfactory ending

I enjoyed this show and thought the main characters had good chemistry. The way they built a friendship was endearing. Even the mil and butler had a good relationship with the main characters. The fact that she had two women out to destroy the relationship made the drama interesting. I kept rooting for the fl to just tell the ml the truth. The ending is very unsatisfactory. No outcome; no answer to whether he ever finds out about the switch; no answer on whether the baby is really his; bad ending for the ml + fl.