I dont know Sitges, but just trying to help in a spare moment - I see there's no reviews on tripadvisor yet. Have you scanned the website of La Escapada?
That may help. Looks OK to me if you like B & B. I might just e-mail them about children if I were you, as they dont mention it. I'm sure it will be fine though, but just to check out any entertainment they may have.
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