I don't think he ever loved her though? so, his heart couldn't have been broken. OJoe's comment seemed to be more about convincing YJoe that OJoes wife would be the love of his life/the best thing to happen to him etc. than actually portraying Piper's character as a whore. Just because OJoe said it, doesn't mean that all we're supposed to see her as. To me, Rian was trying to portray her as a mother more than anything.
Which might be a problem in and of itself, being that all three women in the movie are maternal(OJoe's wife wanting to have children), mothers, would do anything to protect/care for their child etc.