<human>: Can you summarize the given text in a few sentences?

Posting from mobile so bear with me! No throwaway because they don't reddit to my knowledge.

I've lived with Bree and Bianca for just over a year now. We were originally month to month, and signed a minimum 12mth lease officially in January. We all get along great.

Bree, out of the blue, booked a trip to Europe a few weeks ago. She floated the idea of getting someone to stay in her room while she was gone. I was initially ok with the idea if the person was someone she knew (not a stranger) and preferably female. I also said that I'd see if anyone was interested.

It's been a couple of weeks now, and the trip is coming up. As she hasn't been able to find anyone, Bree has put an ad up on Airbnb to try get someone to pay her rent for that time. 

I expressed that I wasn't really comfortable with it, given that we don't have locks on our doors, and I own a lot of expensive electronics, not to mention most of the living room is my furniture.  (Plus I frankly don't see any benefit to myself or Bianca- monetary or sanity-wise with this arrangement. I obviously didn't add this part out loud.)

She agreed to keep looking for someone we knew, but a few hours later texted me saying that she has a girl who is keen on seeing the room, and as a last resort can she have her see the place. 

I haven't replied yet. I don't want to be the bad guy here, saying that she should have to pay a month's rent even though she isn't here, but it's what I would do in that situation ( in fact I have two trips coming up which I will be doing that).

My other housemate seems to be ambivalent, but I believe this is because she also wants to have someone stay on her room for 3 months while she is away December-February(
<bot>: housemate of 1 year wants to sublet to strangers for a month while she is on holiday. I am uncomfortable.