Yes we have thought about just waiting for 2 more years before doing this but our preference is to move in this direction if everyone is onboard with it. Now that being said, we are not going to force the kids into this situation. We will discuss it with them and if any of them are adamantly opposed to the idea then we will wait. We don't unrealistically expect them to be jumping up and down yelling hurrah either. We know it's a big change for them.
As far as moving away from friends, they currently live in Northern Virginia and the kids go a school in DC. The school in DC is a charter school which pulls kids from all over the area, so it's not like her son's friends are living in their neighborhood and he just walks over to their house. To visit them he actually has to hop on the Metro and go into DC. Moving to my house would mean his Metro ride is another 15 to 20 minutes longer. Or we would drive them - or in a few months he could drive himself if he wanted to see them.
So far the idea of moving into my house is actually being received by her kids better than I expected. Her oldest daughter is really looking at only a month or so as she will be away for most of July visiting her grandparents and then off to college in October. My oldest is already at college so over the summer she will be with us 50% of the time and the other 50% with her mom.
As for the possibility of hanky panky, I don't see that happening and I don't think I'm being naïve either. Both my D's have serious boyfriends and they have been around her son enough that I'm pretty confident there is no attraction or concern about them crossing that line. I might be more concerned if the girls were the younger ones (early teens) and he was older.
With the current visitation schedules we have now with our exes, it is going to be only a day or two each week at most that they would all be in the same house.
However, the bottom line is that we aren't dictating this move. These are all 4 really level headed teenagers and we want them to remain that way and know that they have say in the issue and how they feel about it matters to them.