Saggy Tits

I live in Florida in a condo complex. I have an early working day and take my dog for its morning movements at around 5am. This one morning I went out as I do in my nightie and nothing underneath. I usually wear a a coat or housecoat over top depending on the temperature. It was in the high 60s so just the nightie. A young man was walking his dog as well and he made comment on my erect nipples on my double D breasts. I don’t have a great body at 5’4” and a 175 lbs but he told me how much he loved my big assets. He’s 24 and good looking and he asked if we could go out. Laughable right? He said he’s watched me from afar for months and wants time with me. I agreed to a date which turned into making love which now has him wanting to marry me. I won’t lie I love him making love to me. What scares is he loves what I feel to be perverted sex. He loves licking my bum hole, and anal and using whipping cream and other jams and honey on my pussy when eating it. He asks me not to bath for days and loves eating my pussy when frankly, it’s smelling its worst. He proposed and I said yes but really, am I making a mistake? I mean, it’s only been 4 months.