[M]y 58 yr old[F] MIL wants to fuck..

So a little back story about 12 years ago I was living with my now wife then GF at her mothers house. We were young and trying to get on our feet. Well gf was at work and I’m laying in the bed and now MIL walks in a tshirt bra less and loose shorts to get something off the dresser, if I remember correctly it was hairspray. Anyways she says it’s just me and you here and you know I’m a cougar right, with me being in shock and just now waking up my response was is that right and she started to walk out of the room and said I haven’t been touched in going on 5 years. About 5 minutes passed and I finally got the nerve up to get up and walk around in my briefs but she was already on the phone. Anyways over the years she has made comments about being a cougar jokingly. Probably once per year or so. Well 2 days ago I was leaving work and had to stop by her house to pick something up. Well she walks up to me and says coming in here looking all good is turning up my cougar senses and my response was is that so and she hands me the stuff and says you smell so good. She then runs her hand down my arm and then off my elbow to my side and says your making me Um and then stops talking. I started to get hard so I said Im in a hurry and she responds with you know I still haven’t been touched or had anything in me since last time I told you this. As I was walking out the door she said I have to go change my panties but next time you better be ready because I’m going to swallow that dick and have you knock the dust off this pussy and started laughing.