Gulaal and Vasant marriage

Gulaal is behind here in Canada.. I wanted to ask during Gulaal and Vasant's marriage, Vasan't sister was caught with a guy by gulaal and her mother in law...

Who was that guy? was he engaged to that girl? because i noticed that they were calling him jija ji and damand ji and how is he related to gulaal's ex fiance

thanks in advance

i was a bit confused in that to but im not now

thanks again