Are pregnant 3somes not sexy

So my gf is going through that psychotic horny pregnant phase . and keeps having filthy dreams she tell me about every day almost. so..she keep pushing the issue of pulling another chick. but shes over 4 months now and im not feeling it like that

I seen a pregnant stripper one time dancing at a club and didnt enjoy it at all. Not that pregnant women arent sexy I still find her extremely sexy I just don't care to gang bang and pee on a woman carrying my kid

I kind of feel like if I tell her how I feel she'll think im not down for her. we havent had another chick in the bed since last summer. every knows pregnant girls can be overly emotional. Is she just nesting maybe