That's pretty much why Taylor Mills is in the band - otherwise it would just be too macho and competitive for Brian. She adds a 'soft', feminine element and is a bit like a pressure valve.
And why he brought Marilyn in to so many BBs songs. I'm sure we could do a whole analysis of Brian's views of women and how that relates to his view of his mother versus his view of his father.
Although regardless of how Brian might view Taylor's role in the band, she does add a nice musical element to BBs songs.