I would definitely not initiate any R talk at all with him and not share anymore about your emotional state. You've said things could be different if he leaves OW. That is enough info for now.
Maybe your H feels that sex with you would help him leave OW. I don't think that would be a good foundation for your R though.
Stay strong and keep GAL.
Me: 51 H: 52 T: 23 yrs M: 19 yrs S18, D16, S14 (special needs) PA: 2003/2004 Piecing: 2004 on Suspect H had EA: 8/2012-12/2012