No it isn't. Vinyl and Tavi don't do stuff. It has been clear from the beginning. This comic implies Vinyl probably likes to be babied by Tavi.
Think of Girls Und Panzer and the characters,
Katyusha and
Nonna. That is what I see. Octavia has said before that Vinyl is tough to live with, but nothing has ever pointed to them doing other things. Don't even start that rumor.