She smiles, "Great! Then you are from this day forth our equal, at least as far as family bonds go, and you shall be treated as my child." The other three children appear. One of them speaks: "So you'll be living here from now on? Cool, I'll show you where we sleep!" They run off into a hole, and you follow the small tunnel, leading out into a somewhat smaller room than the previous one. "This is where we sleep together, and so will you. Isn't it great? It has grass on the floor so it's a lot more comfortable, although we have a tendency of piling up on each other...it's quite comfy, and great fun too!"
As the night falls, the four of you scurry off to the "sleeping pit", find yourselves comfortable spots...and within moments you're all wrestling eachother already in the "piling" game they told you of earlier, ending about ten minutes later as you have all found comfortable sleeping positions, almost entwined in each other.
You, however, ponder for a bit...you're in the middle of three nubile females, and in your old life this would have been an impossible effort. You aren't even the slightest bit aroused by all this, it all seems so normal to you when you don't force thought towards your previous species and gender.
However, it doesn't take long before you lose this train of thought and doze off into a comfortable sleep, just like your kin. As the situation is now, you don't foresee any problems with fitting in.