Here are some truths about Indian Marriages :
First and foremost, Simi & Abhi are not living in the times where Kings would go out on hunting trips and would find a beautiful girl singing in the forest or taking shower under a waterfall or a bath in the pond and get married to her by exchanging garlands and bring her to the palace as a Queen! Such marriages are called Gandharva Vivah. Those were the Kings times.
What Abhi and Simi did in matarani's temple is Gandharva Vivah and is not considered legal. Marriage is done to be accepted by society and hence needs at least 1 person other than the bride and the groom as a witness.
So, they need to marry in front of the society. There are different rituals in marriage and some that are must. Various communities differ in what they consider as the MUST have ones as the minimum requirement.
In 'Choti Bahu' though Dev and Radh had taken several vows and pheras before marriage, (yes, KB copied CB here again), Shastriji doesn't send his daughter away with Dev even though Varmala, Kanyadaan and Sindoor ceremonies were done. He agrees only after Radh and Dev take the Saath Pheres and Dev puts mangalsutra on Radh in front of society, rest were already done in front of society. So, in KB, it depends which community Abhi & Simi belong to and what their family considers as married.
So, its not enough if Abhi & Simi consider married to each other. Abhi and Simi def need to go and do a proper marriage in front of the society.
I am not even sure we are going to get this in the next week.
Even if they get married to each other properly in front of society and also register their marriage, which a must too.
Now before the marriage is complete, Manju has taken a vow that she is going to consider Simi dead and is going to perform the last rites of her hail and healthy living daughter. First this drama has to be resolved. Its not an easy task to convince Manju. Only hope is RS and he also has been made to sit in some corner of I don't know which park.
Simi will not agree to this marriage until she makes her mother happy. Mother is never going to be happy. So, be assured there is still a long way to go before Abhi & Simi can be considered legally married.