This is a highly advanced, technical secret of Lal Kitab astrology regarding "Mashnui" (artificial or combined) planets.
Rahu and Ketu are always exactly 180 degrees apart. When Rahu is in the 2nd house (wealth) and Ketu is in the 8th house (occult/sudden events), they form an axis.
Dr. Sharma explains that if the person maintains good character (keeping Rahu positive), the combined energy of Rahu (2nd) and Ketu (8th) merges to create an "Artificial Venus" ("mashnui Shukra"). This means the person will suddenly experience the massive luxury, wealth, and glamour of Venus, even if their actual Venus is weak in the chart!