No their behavior does not change because a new BP is in the household, it's either due to stress which can happen over time because of improper husbandry, over handling etc, or because your BP is underfed, they also get defensive aroud shedding time, without more info it's hard to pin point the cause.

Are they house together?

How big is your enclosure?

How big is the female Hypo (weight)?

What are your temps?

How often have you been handling her?

What have you been feeding her and how often?