Curious incident 2

This was our second "d" day meeting. After reading about thirty pages and discussing, I raised the question that if that Mrs. Shears killed the dog, Wellington, and that Mr. Boone and Mrs. Shears are having an affair. The reason Mrs. Shears killed the dog was to frame Christopher so that he wouldn't bother there relationship. Although my prediction might be way off because I've only read so far.