How do you deal with annoying in-laws?

My sister in law recently had a baby and they're over sending pictures. They also expect us to like all on Facebook. They're becoming really annoying and repetitive with the obsession of the baby. It's bad enough that she keeps talking about herself and the baby all the time to everyone when we visit. Do they understand noone has the interest to listen all day? My husband and I are not in the position to have our own yet. What are your thoughts? Any advice?
How do you deal with annoying in-laws?
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