Natal Pluto is the sign where your Pluto was placed during birth time, and from there other houses are calculated clock-wise.
If you were born with Pluto in Sagittarius, then your natal house is Sagittarius (Dhanus Rasi) and during transit, VENUS forming conjunction (in Sagittarius), sextile (aspect of 60° which are Libra and Aquarius in this case), square (aspect of 90° which are Pisces and Virgo here), trine (aspect of 120° which are Aries and Leo here), opposition (aspect of 180° which is Gemini here) are discussed in this article.
Conjunction is transiting through same sign as in birth chart, sextile is transiting 3rd or 11th house, trine is transiting 5th or 9th house, opposition is transiting 7th house from natal sign.
Transit Venus conjunct Natal Pluto: Intuitive inspirations, intense romantic and sexual experiences characterize this transit. The native seeks problematic unusual and intense love. The native suddenly becomes excessively jealous and possessive in love resulting in broken relationship. The native by renovating old and discarded objects makes them reusable. This is an intuitive aspect for artists and musicians. Under afflicted transit the native may be sexual debaucher.
Transit Venus Sextile Natal Pluto: Emotional insight into romance and sensuality characterize this transit. Vigorous emotions arise to relate to an individual or to a group. The native is very keen for love and physical sexuality. Elevated individuals in artistic, musical and creative arts are inspired by this transit. The native is eager mentally to transform the situations around.
Transit Venus Square Natal Pluto : Sexual aberrations and rough attitudes characterize this transit. The native invites resentment and in-harmony for his reforming others, attitudes. Jealousy and sexual incompatibility is faced in romantic and marital life. If the conjunction is afflicted, the native, may be sexually molested or suffer extortion or coercion or blackmailing. A bad time for joint finances, inheritances, insurances or goods of the dead.
Transit Venus Trine Natal Pluto : Harmonious romantic and sexual life and intuitive endeavors in artistic, musical and other such fields characterize this transit. Love is felt and expressed vigorously through mind, emotions and body now. Good transit for business related to art, music and entertainment. The native endeavors on the improvement of old ways of beautifying the things. The native handles corporate affairs, joint finances, inheritances etc. efficiently, effectively and more judiciously. The native is skillfully interested in the art of recycling the old and discarded items.
Transit Venus Opposition Natal Pluto : Selfishness, bickering, jealousy, guilt and negative emotions characterize this transit. The native tends to behave irrationally under the influence of subconscious impulses. The native tries to reform others in close relationships or himself is victim of such behavior from others. The native lacks social refinement on the lower side. This is a compulsive transit, therefore, the native uses others for sexual gratification or himself is victim of sexual seduction and lacks sexual discipline. The native may have to face conflicts in regard to joint finances, taxes, insurances, alimony etc. In refined individuals this transit denotes spiritually meaningful love relationship and intuitive creative artistic expressions.