Could this be a sign of another baby?

So I have 2 kids one is 4 it’s a girl

And one is a boy he’s 8 months

He’s growing thru his clothes so fast when we found out we were having a boy I went shopping crazy buying super hero’s and name brands like Nike and adidas I love the boy clothes !

I went crazy when I had a girl to buying pink and bows and hello kitty but once she grew out the clothes I sold them online and made money for more clothes for her .

But with my sons clothes I can’t let them go he out grew A lot of things leaving them brand new looking almost I can’t get rid of them tho I just fold them up and put them in the closet . Even my husband noticed and he keeps asking me am I going sell them or give them away I literally can’t I don’t want to let go of his clothes I have no clue why my friend I’m close with I use to work with her found out she is having a boy and she told me she’s like now I can have ur sons baby clothes u dressed him so cute I didn’t want to be rude and be like NOO ! I just told her I’m not ready to get rid of them baby clothes are super expensive and I feel like I’ll have another one soon I have no clue why are u moms like this with baby clothes or do u guys just get rid of them ??