It could be good or bad both as I have seen excellent relationships and not so great as well. It depends on individuals, even if you are not blood related you could have a relationship with your sister in law more then your own sister, so there is no guarentee in relationships. I have three sons, my oldest and youngest are very much the same, the middle one in the tough cookie!!! but I know that he would be the one who would be a support to me then the other two. By support I dont mean that he would give me money or would put me first then his wife, no way !!! I dont want that, support means he will be there for me if I would need him, where as the other 2 are very cheeky and would get away. So it depends again on siblings.
Regarding Sanju and Suhana, ideally Deepak should stand on his feet and move to a different house and should give his mother a HOME of there own, Kyshaps have been brilliant no doubt but its about time RB and Deepak make there own little world they both deserve that and Sanju should be part of it. I can sense some trouble in the wedding of them both as for start RB might have problem thinking that they are not good enough for Bajpais, because of her past, and KK although very modern and extremely nice person would NOT have any problem but there would be somebody somewhere would have like Sharda Bua types. So Deepak should first prove himself career wise then anything else.
Very true di. It all depends on the individuals, their families and the circumstances. I know 2 sisters who have married into the same family and believe me they live so happily. For them its just like an extension to what they already had. Mashallah, their family is big and they all live together even today.
About Deepak and Radha bua? Well in OBS they did show Deepak getting a good job and then he buys his own house. He wanted Radha bua to move with him, but she couldn't leave the Lahiris. So Deepak said you can come and set up my home and come and stay whenever you want but you don't have to leave the Lahiris. I wasn't that impressed by the way they handled that topic, so I am not sure what they'll do in SGP.