Well, an *adult* would understand that she perhaps feels a bit of jealousy over her lost youth and your youthful beauty (if not intelligence), by comparison. Its not unusual to feel this a bit. She's your mother, not a perfect being.
Is your mom truly such a horrible person (and are you so truly self-centred?) that you can't find the empathy to say something like:
Awww, mom. You are a wonderful and amazing woman. I love you. You should get out there and date more, there are many men who would be lucky to have you. (or something like)
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh