If you have a big age gap.. come and give me some wisdom!

[TeaPot40]

I have 2 children age 13 and 7 same sex
They get on great and play together well but I have one issue that gives me a headache!
The 13 year old is allowed out to play with friends some friends and they go for a bike ride and chill out etc (socially distanced and there are 3 of them) but my 7 year old always wants to join in...
They are so nice and allow my 7 year old to join in for an hour and then they head off. I also try and make arrangements for the 7 year old to have time with same age friends but difficult now.
The problem is the elder ones mates just call and then all hell breaks loose when the little one can't go..
Just looking for moral support really as all I can do is explain and occupy the little one as much as possible. Also I've said for the older ones to meet down the street like a covert operation
Any stories would be great

mine are the same! two boys, 12 and 6. they get on amazingly... until my eldest wants to do his own thing and then the youngest has a strop. my son is coming up to 13 and obviously he’d rather be out with his friends or on his xbox than playing with a somewhat annoying little brother. i do let the eldest take the youngest into the fields beside our house with him and his friends sometimes - but i have to practically drag him sobbing into the house when they decide to move on elsewhere. and then my 20 month old is obsessed with the 6 year old and follows him around everywhere but then he says she’s annoying - i feel like saying, yeah, well, that’s how ds1 feels about you! 😂

It's hard isn't it..
Im always careful to make sure I don't depend on the eldest too much but my 7 year old adores playing with them all

Ds is 5 years older than dt. They get on amazing but obviously at 16 ds wants his own space /friendships. We set boundaries from the start dt have to understand that when they're older they get to do these things. Ds also makes specific times when he'll take them for a bike ride, let them play ps4 with his friends but dt know when he says that's it they must come away or it won't happen again and they really enjoy their time with ds.

Same thing today..
Littlest one loves being with the big ones so much and was so upset when they all went off for a bike ride..
I'm not as much fun apparently!!