I had to look this up because I was also very confused. I searched for 5 minutes so I could be wrong but loomer has made this exact comment in the past except far more explicitly and linked to her sex life. They clearly don’t get along and loomer has accused her of having multiple affairs. The roast beef comment is a (not very) thinly veiled slut shaming thing, basically, mocking her because her vagina must look unappealing because she had the audacity to have sex with 3 men (allegedly). The idea that your vagina changes appearance if you have more sexual partners is a myth of course

Basically infighting mixed with internalized misogyny