Hi Jingle, your question "Who welcomed disha to sehagal house after her marriage to dk?" the answer is Dev.
Swathi your question "What reason does Ved give when Dish confronts Ved abt his love for her ?"Vedant says he told Porineeta that he loves Disha just to get Porineeta of his back. Porineeta was harrasing him as she loves Vedant and every opportunity she got she was in Vedants room. So Vedant told her this to get rid of her.
My question: Who (what is his/her name) offered lunch to DK and Disha after they were married? (Hint is has to do with the deal Disha wanted to make and DK first did not but eventually he did)