Banana is unsanitary and gross.
Please don't shove food into any hole other than the mouth.
Doctors don't deserve to deal with this kind of crap when you get to the ER and they have to start fishing out rotting pieces of food out of your holes because you couldn't be bothered to use a dildo like a normal fucking person.
My guess, looking at the other tags (lesbian & group sex), is that it's the mysterious benefactor's daughters or his wife together, so not the MC and one of his relative. Unless there's a plot twist that reveals the MC is related to them somehow.