My sister (F18) and my fiancé (M25) swapped toys

My fiance and I were visiting my parents back home and stayed a couple of days. After the visit when we got back to our place I noticed that my fiance has a new toy. A realistic dildo and I was kinda shocked because she never had dildos before only vibrators. Turns out she gave her toy to my sister and my sister gave her own toy to my fiance. This on its own is wild already but as time went by I realised that the dildo was molded from my sister’s boyfriend’s dick. That definitely caught us off guard.