I wasn't sure about this at first but, upon reflection, I think it's kind of neat. The deceased male is in the middle with his two deceased wives on either on each side. There are dates of the marriage at the bottom of the wives' tombstones. If I'm reading it correctly, the one on the left was his wife from 1932 until her death in 1952. He remarried the next year and remained married (presumably) until his death in 1998. The second wife died two years later.
A twenty year marriage followed by a twenty-five year marriage. Not bad.