Sentence 1: Sara thought volunteering at the humane society would be rewarding. 
 Sentence 3: Sara's husband was right 
 Sentence 4:  They now have five cats, although they had agreed to only adopt two 
 Sentence 5:  Sara and her husband love the cats, though, and are glad to have them 
 Option 1: Their cats started scratching on everything and driving them crazy so they stopped at adopting two. 
 Option 2: Her husband joked that they would wind up adopting way too many cats.