Aveilus when parent sitting shiva?

My father in law just lost his brother and will be sitting shiva. Will my husband need to keep any laws of aveilus for the duration of the shiva? I remember a friend not being allowed to attend a wedding whilst her mother was sitting shiva for her parent, is that only because it was the girl's grandparent or are there general halachos when a parent is sitting shiva?

Don't worry I won't follow ImaRabbi blindly and will clarify with a Rav, just want to know what the possibilities are. May we only share good news!

I also remember that you're not supposed to go to weddings when your parent is sitting shiva.
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That's the way the cookie crumbles...

We were told no weddings during the week of shiva until Shabbos.

I think these are done out of respect for the parent, not because one is in aveilut.

By the same token, I do remember reading (Rabbi Lamm) that one who feels close to the person who passed away (a son-in-law or daughter-in-law or sibling-in-law) is PERMITTED to take on some of the halachot of aveilut such as avoiding smachot, but it's not at all obligatory.
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Emmanuel Tzvi: 26 Shevat 5766
Shai Michael: 8 Cheshvan 5768
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Dvir Aharon: 10 Tammuz 5772

My mother just lost her brother 2 weeks ago- I was not allowed to go to any weddings, vorts, or simchas for the week of aveilus until shabbos. It has nothing to do with who your parent is sitting for.

It probably just seems right, but in some circumstances it wouldn't apply. I live near my father. When he sat shiva for his brother, I basically sat with him all week.

Executive Member Joined: May 17 2011 Posts: 271

It usually applies only if you live in the same city as your parent who is sitting shiva.

Just to clarify - I just realised that I never mentioned that the question was about attending a relatives wedding. Though we were told that if FIL was sitting shiva in town he wouldn't be permitted to attend.