I have the house where kids hang out.
I pick my battles. But when there is one, I fight it. I think you have one that needs a strategic war plan.
At 13, you still have a great deal of control over the situation. When I say control, please understand that I have not ever felt my kids were opponents or that I needed to control them. I mean that at 13, you can guide him more easily (or at least differently) than you will be when he's older, driving, working, then away at school, living on his own, etc.
A girl in the bedroom overnight? At 13? That's a pretty big deal, and fear of pushing them together really should not guide your reaction. They're already together.
I am the most laissez-faire parent you'll ever meet. I never did The Talk. I take advantage of whatever "teachable moments" and have ongoing conversations. From preschool on, my kids and I talked about sex, responsibility, relationships, respect, STDs, and the kinds of partners to have and to be. (No, the irony is not lost on me, but I was in the dark for many years.)
Your son may need a pool and hang-out house less than he needs a mom who guides him---about choosing healthy and intact partners, about respect, and about sexual safety.
The good news is that you can be both. You don't have to swing all the way to pole opposite your parents'.
At 13, you're not dealing with a
"SO." You're dealing with what will hopefully be one of many girlfriends he has. I don't say that to minimize your son's feelings; young love is very, very important. But it's a training ground. And the "training" can involve your help framing his feelings realistically. This is not a girl with whom he is apt to remain long-term. He may adore her now, but because their relationship is likely not destined for forever, it would be a shame if it were to lead to permanent consequences.
I think that in your quest to provide a safe haven for your son--which is admirable--you might be having lost sight of the importance of guiding him and--more importantly--of the fact that guiding a 13-year-old differs VASTLY from guiding a 15-year-old (which differs VASTLY from guiding a 17-year-old...and so on).
I get that you want to feel safe to him. I would suggest that safety means talking with him about your concerns and, when necessary, guiding the outcome. I was barely older than him when I started dating stbx. I wish to God my parents had responded to the HUGE red flags raised by his FOO. Would I have hated them? I don't know. I don't think so. (I would hate to share how I feel about their parenting now.)
At 13, if I had concerns about a girlfriend, I would express them. Like you, I would not forbid contact unless there was a very real danger. But I would do my best to ensure my child was very, very busy. A kid who's got lots to do---and it can be really fun stuff!---is a kid who (a) is exposed to different kinds of people and is more apt to conclude that he doesn't want Miss Broken Wing, and (b) doesn't have as much time for his relationship.
You're his mom. Not his friend. I hate it when people say this to me---so I cringe typing it. I DO understand your stance. I am very relaxed about parenting things. But when it comes to relationships, I think it's important to express concerns and offer guidance. It's our job.
ETA: And if you're already providing guidance-which I do NOT assume you're not!--then relax and know you're a-okay. Your mom's approach didn't work. Trust yours.
[This message edited by solus sto at 11:43 AM, November 11th (Monday)]